With the latest release on the stable branch of DayZ Linux Servers, it seems that the appid does not allow anonymous users to run a server.
It blocks LGSM which is a widely used tool to install and manage servers on linux (see https://github.com/GameServerManagers/LinuxGSM/issues/4501#issuecomment-1954672163)

Would you consider allowing anonymous users to download and run dayz servers ?

Cheers !