I think local-first password managers are the way forward. Big tech companies already have way too much power and having them mediate our most important data is a bad precedent to set.

I like that you made this P2P, I designed one that sits on top of sqlite and is 100% local first but is not P2P, take a look if you are interested in some prior art in this space:

https://saveoursecrets.com/

I decided to go with native apps all the way, Rust backend and Flutter front-end but kind of regret it now with how the Play/App stores are such a hassle to work with.