Ok so last year I didnt block the US server because I guess that was just for matchmaking and Europeans was connecting through it
So I just set the circle only to show that it's not blocking anyone
It says blocked but then come through and connect
their location is Russia
Asians, South Americans etc all connect
Last year if I blocked the US server South American server etc it would find a match but then it would say unable to connect and it would cancel the matchmaking.
In other modes it does block people but eventually, a blocked person will connect to me so I always cancel the search myself as soon as I see someone blocked.