Hi. I'm from Colombia, I have the same issue in F1 2019 with Gamepass PC.
I haven't been able to join any league races. I'm in like 5 leagues and all week long I've tried to join races but failed. The game says that it is joining the race, and then pops an error message. It just says an error has happened, or something like that, and I can keep playing offline like normal.
Please I would like to know if the problem is related to Windows Firewall, or if it's related to my country. I always check the server status and they are ok.