Thirded. I self-host it (actually the Vaultwarden fork) and use it on desktop browsers, as a desktop app, and as and Android app (F-Droid). I also store secure notes in it (e.g. end of life instructions for my partner). Very powerful and versatile, and AFAICT, secure.
This is really fascinating. I’m on this journey, too, and do a lot that’s similar, but I’ve not heard of some of what you do/use and some of it sounds beyond my capabilities.