I copied the file to a public dropbox folder.
FCPX_Test.psd
The file is very simple. Three layers. A white background color layer, a light blue background layer (some brush strokes), and a character layer consisting of a dark blue stick figure.
In my case, when I bring it into procreate I get the three layers, but the background brush strokes are yellow, and the character layer seems to just be entirely black (with no stick figure).
Also - I tried bringing this file into photoshop and then doing a save-as from photoshop of the PSD file. When I do that, then the new file works and has all three layers and proper colors. So perhaps there is some incompatibility between Procreate and FCPX. Whatever that may be, it doesn't seem to matter to photoshop - and photoshop is able to rewrite the file without the problem.
Go figure.
I don't want to have to use photoshop, however, since I just tried it with a PS trial license and would rather not have to pass everything thru photoshop.
Thanks much for any insights.