I want someone to take GitHub - s5-dev/lib5: This library is used by Dart-based code for the S5 network. and create a password manager built on S5/Sia.
I see a real need for a decentralized (web3) one, as the only good FOSS ones, IMHO, that can be considered cloud are Bitwarden & its rust port.
The only thing comparable right now is https://liso.dev, which the developer seems to be unavailable due to personal/family issues and is not fully FOSS.