Best to move on from this wish. It’s never happening. From the COO:
Personally, from experience (not expertise) if (and I may be wrong) your AVR has a TV and maybe Projector and TV/Satellite antenna and other components connected to it, I wouldn’t worry about interference that may be added to the system via a small 5Vdc powered Allo DigiOne or HiFiBerry Digi+ Pro…
In terms of the Roon experience, there is way more upside than downside by adding one of these to your Denon AVR.
Again, just speaking from my own personal experience, not expertise.