According to the list referenced by Affinity the Phase One IQ1 100MP and Phase One IQ3 100mp are both listed as supported RAW formats. Apple iOS supported RAW cameras.
In Affinity Photos for iPad the IQ3 100MP files will open properly and without error. Unfortunately the IQ1 100MP files will not open.
I receive the following error when opening files from the IQ1 100MP camera:
"/private/var/mobile/Containers/Data/Application/6EDABF1A-11DE-4215-93DD-92FE1D-B057CO/tmp/loading.iiq This file type is not supported"
I can provide sample files from both cameras for reference if requested.