You didn't provide a sample, so there's nothing to talk about.
In any case, the video renderer does not play files, it displays frames in the player window. The video renderer does not know what format your video file is in (mkv or m2ts). The video renderer receives the decoded frames and all additional information from the decoder.
Dolby Vision Profile 8.1 is HDR10 compatible, so should work with default settings (as it does when playing your MKVs).
Thanks for your work,the render can play dolbyvision even p8 with REMUX file. But M2TS can not,i clicked prefer dv over pq.