If Canon EOS-R .CR3 RAW files are imported in Affinity Photo (here tested on version 1.8.3.641) the imported files look dull, having a purple flare all over the image, and the right margin is underexposed by 2 to 3 stops.
Please see some samples (original .CR3 files and printscreens) of the files in Affinity Photo, comparing them to the .CR3 files from Canon EOS M50 (which look fine) here:
https://www.dropbox.com/sh/205wvzlk0n04ne3/AACQQCKlqNiOnJpxhjgbDAS4a?dl=0
You can download all files, please feel free.
And of course you can follow my discussion about this topic on Facebook in the (closed) Canon EOS R usergroup, see here: https://www.facebook.com/groups/421157698288581/744588459278835/?comment_id=744605112610503&reply_comment_id=744633389274342¬if_id=1586770268712221¬if_t=group_comment
Thank you.