Thanks for all the comments. Currently I use KeepassXD/DX + Syncthing.

I hash my password with fingerprint on Android, keep a seperate database containing that one in another place for backup. Maybe thats stupid, but I cant type on a phone.

On Linux I use KWallet, store the Keepass password there, and have a shortcut fetching that password and inserting it into the Keepass wallet using KeepassXC. Works with one click too.

Problems

• all entries are either locked or unlocked
• to have autofill working, the app cant be killed (Android)
• also, all passwords need to be decrypted for it to work

I dont see that this is the best solution. Decrypted, maybe hashed metadata possible to detect autofill fields, and then selectively unlock the needed credentials, would be better.