Microsoft Defender firewall list of allowed apps and functions

Hi,
I play online games but never had to manually add any of them to the firewall, because games can add themselves to the firewall exception list (if run with admin rights) and also use UPnP to navigate through router NAT.

not all games do that so you need to manually do it for some of them.
in Firewall Advanced settings of Windows, you can check inbound/outbound list of allowed connections and add/delete them.

also, Windows questions belong in here: https://techcommunity.microsoft.com/t5/windows-10/bd-p/Windows10space