Bitwarden now has their own secrets manager!
https://bitwarden.com/products/secrets-manager/
Ignore the enterpriseyness of that link. Once you log in normally just make an org and you should see the option to use secrets manager. It’s free for up to two orgs.
I wouldn’t be surprised if there are hardcoded credentials in places and that’s enough for them to be able to say they can’t lol