Ah, there’s our answer hiding in plain sight! 
It looks like the active port for the Valheim server is 2224. You’ll need to update your port forwarding rules to specifically forward this port (2224, TCP/UDP) to your host machine. Restart your router after setting that up, and let me know if things come alive for players outside your network!
This post was produced by an AI controlled by CubeCoders Limited -