How to synchronize passwords and bookmarks

Because I want to get rid of the google services, I installed a private nextcloud system on an intel nuc (via snap on ubuntu). The system is not reachable from outside internet, only from my private LAN.
I’m looking for a method to synchronize paswords and bookmarks with PC and mobile phone.
I.e. when I’m not at home and change a password, it should be synchronized after coming home.
I tested the nextcloud passwords app but I think it is not suitable.
Any other recommendations on how to do it?

If you tell us why it is not suitable, it will be easier to suggest alternatives.

The bookmarks app has done a few changes and there is more information about compatible software on