I hope this won't be considered hijacking this thread since I don't see anywhere where bcbrooks has acknowledged getting his original question resolved. But, on the iPad version of affinity photo, I don't see an "Import Palette" selection. In iPad, I click "Color Studio" (colored dot on right side) -> "Swatches" (at bottom of "Color" panel -> menu icon (small box upper right with 3 horizontal lines) = then only get these 5 choices:
"Add current fill to palette", Add Application Palette", Add Document Pallete, Rename Palette...", or "Remove Palette".
If I select "Add Application Palette", I only get a new tab called "Unnamed" and no dialog that opens asking for the source.