is there there a way to ban a user and cshake it show the reason so that the person hoe banned knows why they are banned
Ban a user from where? You can do that in a game's comment section or community. But I don't think they can see the reason, only other moderators.
I mean mean a community
is there possible to add a reason
Yes, for other moderators only.
but is it possible for add a reason so the user banned sees it
No. I already said this three times.
ok