MLB The Show does not work on my T-mobile 5g internet box.

I have the same problem. Game was working earlier last year when it launched now Im getting the same connection error when opponent is found. Seems like TMobile and SanDiegoStudios are clueless as there are no fixes for this issue anywhere. I have NAT Type 2 which is probably the issue but there's no way to open ports on the wireless gateway. I have no other issues with online games on PS5 or PC besides this game. If TMobile and SDS had good customer service this would have been figured out by now but apparently neither of them care enough to get this issue resolved for paying customers