I’m guessing but please confirm. Your on one of the Uniti fixed wireless services? They put a little dish or aerial outside your home? Probably from a company called Ubiquity? That’s a Ubiquity PoW adapter which powers the aerial?
If so… supplying your own router is a good start as there won’t be another router in this configuration. At least not ISP supplied.
So, next question…
Can you look at the “WAN address” on your router and see if it falls within the range on this post?
If it’s not within that range (which would be good) then look at your UPnP settings. They should be off / disabled as you don’t really want to run UPnP with manual port forwarding as things can get confused.
Next thing to look at… You added a custom service “Roon”. Did you set this for Service Type as TCP or TCP/UDP?
And, then, a lot of fixed wireless providers don’t allow inbound connections so may need to investigate this with Uniti. But the community will troubleshoot all we can.