How do I import, edit, and save RAW files from OM-1 camera to OI.share on iPhone 16?

I’m having problems editing and saving RAW files from OM-1 camera to OI.share on iPhone 16. Can see the photos in OI.share on the iPhone, can select individual photos but can’t import, edit or save them. When trying to import them they default to save in Photos, instead of OI.share, but can’t be seen or read in Photos. Any suggestions? Thanks