I have a pet peeve with my Apple Watch 11. When it's doing a charge to 100% it will send a message to my iPhone. When it only charges to 80% and it's done it does not send any message telling me it's done. As my charger for the watch is in another part of the house I find this irritating. Please Apple if you update the software just have the watch send a message when it's DONE charging. That being 80 or 100%. Simple.
That is the case also with my Series 11 watch. It's my first Apple watch so I am still learning about how it works (acquired it in December). I also get a message on the iPhone that the watch is fully charged (100%), but no message when it reaches 80% and stops.
For me this is not even an issue because it charges so quickly. I basically charge it when I am in the shower or perhaps shaving and getting dressed. Each of those charging sessions might be 10-15 minutes, and it reaches 80% so fast that I never really need to check or worry that it isn't done.
If this remains inconvenient for you, I would recommend that you provide feedback directly to Apple (Discussions are a user to user forum, but Apple engineering does not participate): https://www.apple.com/feedback/watch/
Apple Watch doesn't notify when charging stops at 80
