Sorry and Thank you for the update for some reason I couldn't find anywhere else it was stated being addressed. Looks like I know what I am doing this weekend.
This was solved. The machine that HexOS is installed on had a different outbound IP than the machine that I was using Deck on.
Using the TrueNAS interface, running this shell command got me the correct IP to enter manually on the Deck page.
curl ipinfo.io/ip