How to use Group Leads to approve Facebook group members Individually
You can now approve new members individually by clicking the Approve button next to a member’s name.
When you click this button, there won’t be any Group Leads approval popup but the data of the member would be dropped into your google sheet.
In addition to that, if you check your email marketing autoresponder, you would see the email submitted by the new members while they join your group.
I hope this helps.