Is there a way to get all the turnbasematches that can join

I am using Unity's GameKit to implement a turnbase game. I want to make a UI in Unity to show all the games I can join. I tried using

var matches = await GKTurnBasedMatch.LoadMatches();

to get all the open matches. But it seems that I can only get the matcm related to the current apple account. Can you help me get all the matches? ALSO

I used

var match = await GKTurnBasedMatchmakerViewController.Request(request);

to exit the gamecenter interface and start a game (automatic matching, no one was invited)

Another device used

var match = await GKTurnBasedMatch.Find(request);

to find the game, but it did not find the game, but it start a new game (automatic matching).

Can you help me solve these problems?