Why not stick to simple/heavily vetted password managers (like keepassx)? is there some advanced feature you use?

I hope you're not using KeePassX, it's been unmaintained for years. KeePassXC is only available for Linux, which means I'd need to use a third-party app for Mac and iOS, so I'd be trusting three vendors instead of one.

Aside from passwords, I store passkeys, secure notes, and MFA tokens.

Seamless syncing is the primary reason I stick with BW