Allistervf You're right it might be disruptive. Also have to say this game has a very CLEAN HUD, and I'm agree with not getting notifications in middle of the match (like the achievements). Cuz it is what it is, a SHOW 🎉
So let's specify...
Maybe not in middle of a match, but in the photo scenario, when the Played Together menu (I guess this is the moment when you mostly get a friend request) If somebody adds you and you can see the notification without leaving to lobby, you can cancel matchmaking and join with him. It happened to me 3 times I got requests but when accepted they're offline 🤣
In case of get a request during a match, it can shows after, like the achievements. 👍🏻
EDIT: Oh! I saw the notification for the first time! in quick match lobby:
So, the thing is to shows up in the Played Together screen, after the photo, to know if Play Again or get back to lobby 🙃