So this worked for a few hours then it randomly stopped working. No settings were changed during the period it worked then stopped working, it seem almost random that it stopped.
When first loading back it connects to a server in Ireland (ID: ccb9b580566b1d22), I think this might be a play station server though? As it doesn't seem to connect to it for very long, then I was switched to a server in France for the actual game host (ID: a723a974c046d1d6)
I've tried resyncing again, turned my PS5 off, unplugged the netduma 20 seconds and 10 minutes, even performed a factory reset, still the same.
The only thing I can mention is, I do have two PS5's in the house and the other does sometimes join me for matchmaking. but remains connected to my Virgin Media router (Not my netduma) and this sometimes gets added to my devices on my netduma without me actually ever connecting it to my netduma, as both appear in device manager with their different IP's.