When she saves the preset from the image I sent her to “user presets“ it shows as saved but when she goes to apply that saved preset to another imagine it doesn’t show on the list Any insight on what might be happening there? I’ve tested myself and seem to have the same issues.
If you open a Raw/DNG file, you'll see the full list of presets. If you open a JPG or TIFF, you might see a partial list or none, depending on how the presets were created. If you plan to share presets for use on iOS for photos other than DNG/Raw, you might want to limit the scope of the presets to just those settings that will transfer to a JPG, or make sets of presets. Remember that you can stack presets (one preset for Light settings, a different preset for Detail, etc) so you can build your presets that way for better compatibility.