AirPods 2 stopped working for me after upgrading to iOS 14.0.1. Wouldn't work with my iphone or ipad. Had to delete and re-add them on iphone, and they started working on both iphone and ipad after that. Did not have to delete/re-add them on ipad, which is odd.

I had an issue with AirPods 2 repeatedly disconnecting from MacBook Pro after 10-15 seconds. However, they were stable with my iPad and iPhone. And AirPods 1 and AirPods Pro were stable with my MacBook. Very strange indeed. I ended up having to re-set my AirPods 2 following the 15 second case button hold described here https://support.apple.com/en-us/HT209463 and then re-add them to MacBook, and other devices. Once completely reset and re-added they seemed to be holding stable connection once again.