Unable to join a friend on the server

We decided to play Minecraft with a friend. I play on PS5, he on the phone (Iphone).

The situation is this, he creates a server (meaning a map), I want to join, but in the end it writes to me “IT WAS NOT ABLE TO JOIN YOU.” We tried everything, nothing works, even I created it and he joined me, the result is the same.

What to do? Wait for the next update?