You need DXVA2 (copy-back) to return frames from GPU to system memory. Otherwise SVP can't get them.
DXVA2 (native) process frames inside GPU and do not copy them to memory.
About DeoVR and Vhirlgig. These players needs Codec Tweak Tool for tuning: https://www.svp-team.com/wiki/SVP:Whirligig
And Codec Tweak Tool can't give you ability to select AviSynth Filter instead ffdShow.
So, for now answer is NO. But I think it is possible to find another way to select AviSynth Filter. We need some searching and investigating...