How get an email if somebody responds to my question to the community.

First make sure you have allowed the email notifications by tapping your user icon in the upper right and choosing Preferences. Then under Messages from Apple, make sure there is a checkmark next to Participation.

Currently you are only set to get Notifications from one other post listed here. For any other question you may have asked, you need to make sure the Bell icon located under your question is a solid color. When you first post a question it will be filled in automatically meaning you are subscribed and will get an email as long as they are allowed in your Preference settings above, but you can tap the Bell icon at any time to stop receiving email notifications for that particular post. Here is the only other post that your are currently subscribed to.

How to stop syncing between accounts on i… - Apple Community

it should happen automatically. if it is not, check your settings.

click on your avitar near the top right of this page and choose "view profile".

and then adjust your selections in the "messages from apple" section.