You can add a group by invitation. In the group chat window, open the details of the chat group, click the plus sign, and select the inviter to invite you into the group.
Tools/Materials
1
iphone11
2
iOS 14.7
3
8.0.10
Methods/Steps
1
This page is taken from experience without authorization
2
Click the plus sign. Click the plus sign at the end of a group member
3
Select friends invite to the group Let the friend select you, click "finish", you can invite you to join the group, you agree to the invitation can join the group