Palworld's UDP 27015 query port conflict kept Deadlock and PUBG from launching
Only while Palworld Dedicated Server was running on Windows 11, Deadlock would not advance past the loading screen after launch, and PUBG showed an "external provider authentication failed" error. When I stopped Palworld, Deadlock launched. After that, I changed Palworld's Query Port from UDP 27015 to 27100, and PUBG could launch while the Palworld server kept running.