To confirm if your ISP is blocking game traffic, try this:
1: Turn on Mobile Hotspot on your phone.
2: Connect your PC to your phone's hotspot.
3: Try launching a game.
If it works > Your ISP/router is the issue.
Also, Disable Proxy & VPN
1: Press Win + R, type inetcpl.cpl, and press Enter.
2: Go to the Connections tab > Click LAN settings.
3: Uncheck "Use a proxy server for your LAN" (if enabled).
4: Click OK and restart your PC.
5: If you're using a VPN, disable it and try again.