Use plus icon to add members to private group
One of the outcomes of the Sponsor6 user survey, which ran in the summer of 2021, is the user's request: "Instead of using the sharing icon to add to the group, there should be a + icon or an option in the three-point menu to add to the group. The sharing icon should be to give the group link to someone else."
Another user gave the feedback "Invite users at the bottom of the page and float", which may be a request to use a floating action button for adding members.
A third user gave the feedback "Adding a friend with the share button is not appropriate for me, one must be added from the settings section", which may be a request to add members via the member list screen.
A fourth user gave the feedback: "To add an audience, I habitually went to the dot. As a result, it was a little strange for me to use the 'subscribe' icon to 'invite'. The corresponding icon is known as 'subscribe'."