I searched a bit on internet and I found this:
Researched if Photo Mechanic reads crop metadata from Capture One
No. The problem is on the Capture One side — it simply does not write crop data to XMP sidecar files at all. As Camera Bits developer Kirk Baker put it: "I am not aware of any crop data written to XMP by Capture One."
Also now that Associated Press (AP) entered a global partnership with Capture One?
Best,
eliano