I use KeepassDX on family mobiles with Syncthing for copies between laptop and phones. What would i gain moving to Vaultwarden, knowing that i would never open my network to the outside world? It would be easier to manage for sure, as im having to setup phones and laotops myself in the family and worry that they do silly things like turn off syncthing. But what about offline access to passwords? Does Bitwarden mobile client keep a local copy of database until it can sync?
That is another problem i face when i have the app open on desktop and phone at the same time. Its a nightmare.
Keepass2Android can use an sftp server. If something was changed on the desktop, Keepass2Android will ask if it should merge the changes.