Why does the name I chose show up on someone else’s iphone
When I change the group name on my iPhone messages app, my friends group name also changes
iPhone 13
Question marked as
It's because a group name is just that, for the entire group. When you change the name anyone in the group will see the group name as what you changed it to. That's how it is supposed to work.
Have a group conversation in Messages on iPhone - Apple Support