Looks like a specialized thing that very few people are going to use, and therefore test and report problems with to be fixed. Pretty much everyone needs physical outputs as well, and so a standard GPU fits the requirements perfectly.
Do you already have that card? If so, toss it in and try it. Report back here how it went.
You might need to use the Advanced Output mode (Settings -> Output), and then Custom in there, so that you can supply your own command line for FFmpeg. Once you do that, the answer is probably, "Yes, it'll (eventually) work, but you're on your own to figure out that command line."
Or you might get lucky and have it appear as a standard AMD GPU that "just works".
If you're looking at buying one instead of a standard GPU, why? Is it cheaper? Better available for some reason?