Share app with group as user not co-author

I can’t seem to share my app with a group as a user, the only option I have is co-author which is no good as the group is made up of clients.

At the tenant level, the group has the “App User” role, and at the folder level the group also has the “App User” role. However, I still cannot grant the group user access.

The documentation from UiPath is next to useless, if anyone can help that would be appreciated.