Did you copy over your original catalog from old to new computer?
Did you use XMP sidecar files and if you did, did you copy them over with the images?
Take a look at this articles to move from one computer to another.
I copied the LR library, all of the pics, presets, everything in the folder where "presets" are in, and also camera profiles and lens profiles. It still doesn't work
It's possible it's about the curves? It looks like sometimes LR uses "linear" curves where "custom" should be used, but I'm not sure yet (it's hard for me to change drives multiple times)
Did you copy over your 'User' Camera Profiles from the below folder location to the same location in the new system?
C: \ Users \ [your username] \ AppData \ Roaming \ Adobe \ CameraRaw \ CameraProfiles \
Macintosh HD / Users / [your username] / Library / Application Support / Adobe / CameraRaw / CameraProfiles /