You can buy euro cylinders that allow a key to be in both sides at once.l and still lock / unlock.

I would say a Nuki would be my go to, no change to the external look of the lock. Can interface with a key on the inside of a thumb turn and if you want to change to a euro cylinder with a thumbturn inside so that it doesn’t have a key installed inside permanently then that’s 5 minute DIY job.

Dahua make one with a compatible screen I am pretty sure.

If is just a euro cylinder?

https://nuki.io/ would work?

To me, wired with POE feels like the best option (don’t need to charge it and the connection is more reliable than WiFi); assuming that it is practical to get an ethernet cable to the destination.

I have a unifi g4 pro, I really like it.