Since we have unlisted topics on here, why not we have private projects?
Private projects can be published and only open to people who have access to it (the owner can edit the viewers)
And then when you choose private it will loook like this:
The settings will look like this:
Oh and if the owner send a link to a private project and when someone who isn’t allowed to view it pressed it, it will alert:
You are not allowed to be in the project