Presets appear in LR CC on macOS but not on iOS

I have a few presets that are inexplicably gone from ONLY the mobile version (iOS) of Lightroom CC.

This is what happens with, for example, Preset X:

In Lightroom CC on macOS

• Preset X is visible and able to be applied (at least partially, because I can visually see the change)

• I have the option to ”Show partially compatible presets” set to visible (I forget the actual wording)

In Lightroom CC on iOS (both iPad Pro and iPhone Xs Max)

• Preset X is NOT visible and therefore unable to be applied

• There is no option for showing partially compatible presets that I can find in the iOS version of Lightroom CC

These are RAW files, I’ve tried both CR2 (Canon) and RAF (Fuji).

I’ve tried deleting and re-installing the presets to no avail. They’re always visible and able to be applied on my laptop, but invisible on my iPhone and iPad.

Perhaps I misunderstand why a preset might not be ”fully compatible” and therefore visible with a RAW file. Is there a guide to that anywhere?