Whwn trying to invite player to world it dosent send, but when diffrent player invites to world invite sends and let's player join world.

When I try and invite a friend to my world, it dosent send anything to let the other player join my world, but when they would invite it acctually sends me an invite and let's me join there world. It's not realms I'm trying to invite a friend to it's a world I created. They have the apple XR and i have a samsung s8.