LAN game server not visible through Zerotier - local LAN works

[zt-travis]

Some more info here:
https://zerotier.atlassian.net/wiki/spaces/SD/pages/7536695/Problems+With+LAN+Game+Announcements+and+Broadcasts+on+Windows

Maybe try the linked WinIPBroadcast or ForceBindIP | r1ch.net programs.