in the lobby I see the messages of the other players, but if I write, nobody reads me.

Only in server game.
Microsoft game chat works correctly with all other games.
in worlds shared by friends or those created by me the chat works.
if I create a bedrock server on another pc and I access it the chat works correctly.
my chat does not only work with Hive, Cubecraft, Mineville, Mineplex servers etc.
I've never used chat inappropriately