I think many users in the Iranian region can not connect. Only users who share a common Internet resource can connect well. For example, I turned on the internet and hotspot on my phone, and the laptop connected to my hotspot. I ran Preview View on both my phone and my laptop, both of which join well into the game room. But my friend, whose phone was connected to another internet source, could not connect. Of course, for a moment, the game console debug showed that three peers had joined, but in fact, the third peer player object did not sync and did not appear, and after a while Seconds disconnected.