Nobody else on my team wears a tinfoil hat like I do, but I'd be happy with https://www.passwordstore.org/ with the data stored on a private git repo that we can all access.
This is what I use for my own passwords and I'm able to sync them across devices, which is nice.
I use gopass (https://github.com/gopasspw/gopass/) which works well, but I don't share with anyone. Always wondered how I might jump that hurdle.