@yusf What are you wanting to see incorporated? The directory sync connector?
That diff that @girish linked is to add experimental support for the upstream Directory Connector APIs to allow you to use the upstream connector.
The directory connector could probably be added as a separate app much like ONLYOFFICE is with Nextcloud.
Alternately, I wrote the original bitwarden_rs_ldap connector, which was supported from within the single install. It was auto configured and then triggered by a timer every 5 min to auto send invites. The reason it wasn't included in the final Cloudron release was because the LDAP connector doesn't in the same way as other Cloudron apps and it was confusing to the users who were testing.
As @girish said, it works by sending users invites. Passwords cannot be synced because the Bitwarden server never even gets to know your password.
It looks like it has been removed, but we could probably patch back in the old LDAP sync at least and make it something that could be configured using file manager or the terminal as an advanced feature.