It takes a little more effort to setup, but the alternative to syncing a local keystore db like KeePassXC would be vaultwarden, which is a self hosted open source Bitwarden server that gives you all the features of Bitwarden and has full compatibility with all the clients.

Spinning it up is actually very easy, you just have to decide if you want to integrate SSL via a reverse proxy setup or just use the builtin webserver for HTTPS.