For Anyone Who Misses Or Swipes Away Family Sharing Notifications?
This is not a question but simply a solution to anyone who needs the information.
I recently had this issue with my daughters iPhone. I swiped it away and didn’t know what to do. So I had her turn her phone off for 1 full minute. Then turn it back on, go back and request it again. It worked and then I received the notification. Hope this helps!