Yes

Specific beats general.

Exceptions Supersede General Rules

General rules govern each part of the game. A general rule is in effect as long as something in the game doesn’t explicitly say otherwise. When an exception and a general rule disagree, the exception wins.

The Grappled condition is more specific than the rules for Mounted Combat because it applies in a narrower, triggered circumstance and explicitly grants an action, which mounted combat does not remove.

The Mounted Combat rules describe a general situation—how movement, initiative, and positioning work when one creature rides another. They do not restrict actions except where explicitly stated, and those restrictions apply to the mount’s normal actions.

By contrast, the Grappled condition is a defined mechanical state with explicit rules that apply only while the condition exists. Conditions are designed to override normal circumstances.

The Grappled condition explicitly grants a mechanical permission:

A grappled creature can use its action to make a Strength (Athletics) or Dexterity (Acrobatics) check against the grapple’s escape DC, ending the condition on itself on a success.

Because this permission is explicit and no mounted combat rule negates it, a grappled controlled mount may use its action to attempt to escape the grapple.

Yes

Exceptions Supersede General Rules.

Exceptions Supersede General Rules

General rules govern each part of the game. A general rule is in effect as long as something in the game doesn’t explicitly say otherwise. When an exception and a general rule disagree, the exception wins.

The Grappled condition is an exception to the rules for Mounted Combat because it applies in a narrower, triggered circumstance and explicitly grants an action, which mounted combat does not remove.

The Mounted Combat rules describe a general situation—how movement, initiative, and positioning work when one creature rides another. They do not restrict actions except where explicitly stated, and those restrictions apply to the mount’s normal actions.

By contrast, the Grappled condition is a defined mechanical state with explicit rules that apply only while the condition exists. Conditions are designed to override normal circumstances.

The Grappled condition explicitly grants a mechanical permission:

A grappled creature can use its action to make a Strength (Athletics) or Dexterity (Acrobatics) check against the grapple’s escape DC, ending the condition on itself on a success.

Because this permission is explicit and no mounted combat rule negates it, a grappled controlled mount may use its action to attempt to escape the grapple.

Yes

Specific beats general.

Exceptions Supersede General Rules

 

General rules govern each part of the game. For example, the combat rules tell you that melee attacks use Strength and ranged attacks use Dexterity. That’s a general rule, and a general rule is in effect as long as something in the game doesn’t explicitly say otherwise.

The game also includes elements—class features, feats, weapon properties, spells, magic items, monster abilities, and the like—that sometimes contradict a general rule. When an exception and a general rule disagree, the exception wins. For example, if a feature says you can make melee attacks using your Charisma, you can do so, even though that statement disagrees with the general rule.

The Grappled condition is more specific than the Rules for Mounted Combat because it applies in a narrower, triggered case and explicitly grants an action, which mounted combat does not remove.

Mounted Combat rules describe a general situation—how movement and positioning work when one creature rides another.

By contrast, the Grappled condition is a defined mechanical state with explicit rules that apply only while that condition exists. Conditions are designed to override normal circumstances.

The Grappled condition explicitly grants a mechanical permission:

A Grappled creature can use its action to make a Strength (Athletics) or Dexterity (Acrobatics) check against the grapple’s escape DC, ending the condition on itself on a success.

Therefore, a grappled controlled mount may use its action to attempt to escape.

Yes

Specific beats general.

Exceptions Supersede General Rules

General rules govern each part of the game. A general rule is in effect as long as something in the game doesn’t explicitly say otherwise. When an exception and a general rule disagree, the exception wins.

The Grappled condition is more specific than the rules for Mounted Combat because it applies in a narrower, triggered circumstance and explicitly grants an action, which mounted combat does not remove.

The Mounted Combat rules describe a general situation—how movement, initiative, and positioning work when one creature rides another. They do not restrict actions except where explicitly stated, and those restrictions apply to the mount’s normal actions.

By contrast, the Grappled condition is a defined mechanical state with explicit rules that apply only while the condition exists. Conditions are designed to override normal circumstances.

The Grappled condition explicitly grants a mechanical permission:

A grappled creature can use its action to make a Strength (Athletics) or Dexterity (Acrobatics) check against the grapple’s escape DC, ending the condition on itself on a success.

Because this permission is explicit and no mounted combat rule negates it, a grappled controlled mount may use its action to attempt to escape the grapple.

Yes

Specific beats general.

Exceptions Supersede General Rules

General rules govern each part of the game. For example, the combat rules tell you that melee attacks use Strength and ranged attacks use Dexterity. That’s a general rule, and a general rule is in effect as long as something in the game doesn’t explicitly say otherwise.

The game also includes elements—class features, feats, weapon properties, spells, magic items, monster abilities, and the like—that sometimes contradict a general rule. When an exception and a general rule disagree, the exception wins. For example, if a feature says you can make melee attacks using your Charisma, you can do so, even though that statement disagrees with the general rule.

The Grappled condition is more specific than the Rules for Mounted Combat, and it explicitly allows a creature to use its action to escape:

A Grappled creature can use its action to make a Strength (Athletics) or Dexterity (Acrobatics) check against the grapple’s escape DC, ending the condition on itself on a success.

Yes

Specific beats general.

Exceptions Supersede General Rules

General rules govern each part of the game. For example, the combat rules tell you that melee attacks use Strength and ranged attacks use Dexterity. That’s a general rule, and a general rule is in effect as long as something in the game doesn’t explicitly say otherwise.

The game also includes elements—class features, feats, weapon properties, spells, magic items, monster abilities, and the like—that sometimes contradict a general rule. When an exception and a general rule disagree, the exception wins. For example, if a feature says you can make melee attacks using your Charisma, you can do so, even though that statement disagrees with the general rule.

The Grappled condition is more specific than the Rules for Mounted Combat because it applies in a narrower, triggered case and explicitly grants an action, which mounted combat does not remove.

Mounted Combat rules describe a general situation—how movement and positioning work when one creature rides another.

By contrast, the Grappled condition is a defined mechanical state with explicit rules that apply only while that condition exists. Conditions are designed to override normal circumstances.

The Grappled condition explicitly grants a mechanical permission:

A Grappled creature can use its action to make a Strength (Athletics) or Dexterity (Acrobatics) check against the grapple’s escape DC, ending the condition on itself on a success.

Therefore, a grappled controlled mount may use its action to attempt to escape.