Hello,
I tested the game on another connection by disconnecting my PC from my home Internet and connecting it exclusively through my Kyivstar mobile Internet hotspot.
The problem remained exactly the same: no Official European servers are displayed, while only Asia Pacific and South America servers are found.
I have also contacted my ISP, Kyivstar, with the network diagnostics and asked them to investigate possible routing/connectivity issues. I will update this report once I receive their response.