Yep. Did all that.
It can work on DLDSR on I think, even though the message says otherwise. I think the difference is you can't use the filter live to adjust values on the fly if DLDSR is enabled.
I did try it in Wasteland 3 and RTX HDR worked on that. The game it didn't work is Soulcalibur 6. Funny this as I said was auto hdr works fine in that game and makes a big difference.
It is Beta, it will no doubt get better. I will defo use it when I decide to play an old game one day. But right now I have zero use for it in it's current state.
Doesn't work with dldsr for me at all.
Don't have SC 6 so can't try but so far it has worked in all games I've tried so bit weird why it wouldn't work on games like that.