https://www.justwatch.com/blog/post/announcing-gopass/
One of the claimed features is "multiple stores: Combine several work teams and your private store!"
Keyringer: encrypted and distributed secret sharing software https://keyringer.pw/
eg I know some phone/sms services that only let one account manage a phone number or something.
Also, sometimes account licences are absurdly expensive.
There's some services that even though we have (say) 50 licenced users, they also want us to have licences for each admin. We're not spending $50k/year just so we can each login once or twice a year to fix/configure something for someone.
[0] https://git.zx2c4.com/password-store/plain/src/password-stor...
Initialize new password storage and use gpg-id for encryption. Multiple gpg-ids may be specified, in order to encrypt each password with multiple ids. This command must be run first before a password store can be used. If the specified gpg-id is different from the key used in any existing files, these files will be reencrypted to use the new id. Note that use of gpg-agent(1) is recommended so that the batch decryption does not require as much user intervention. If --path or -p is specified, along with an argument, a specific gpg-id or set of gpg-ids is assigned for that specific sub folder of the password store. If only one gpg-id is given, and it is an empty string, then the current .gpg-id file for the specified sub-folder (or root if unspecified) is removed.
-- https://git.zx2c4.com/password-store/about/
EDIT: Better formatting
Edit: See sister comment by runejuhl.