You can currently copy passwords and secrets from the vault and share them securely with external parties via the “Send” tab.
It would be nice if you could click on the three dots (options) for an existing login and then select “Share login with external person (who has no account) via Send”. Then you can (de-)select which fields from the login should be shared (user name, password, user-defined fields, notes, etc.) and how long it should be visible, when the send is deleted, password, … (the usual “Send” options).
So that you don’t have to copy everything out of the vault and so that several separate fields can be shared within a send.
(It’s not like Vault Item Sharing, as in my suggestion the target user has not their own Bitwarden account)