I received the android 11 update last night.
Since then the Garmin connect keeps asking to sync with my device.
I have done the sync, which worked as usual, but then I get another message asking to sync again and again
Sounds like a reboot of your phone and watch is in order as a first step.
Thanks. I have tried that but the problem is still there.
Might try unpair and pair between your phone and your Garmin using these directions: