Uploading RAW files to iPad (Sony ARW)

I recently upgraded my camera from Sony a6400 to Sony a7RIII, the fundamental difference is Full frame and higher resolution to 42 megapixels.

My prior workflow was to upload pics from SD card using the Apple SD card reader to iPad where I would be able to further delete unwanted pictures before importing into my Photo Edit software - Affinity.

With the new camera, the RAW file images are not visible, they appear as gray squares in Photos App. They are visible in the Edit software so there is no data loss.

I have tried to upload to iPad in both Compressed and Uncompressed formats. The Sony RAW files still have an .ARW extension so as best I know they are the same as before, just bigger.

Could it have something to do with the latest IOS update 15.0.2 ?

Would really appreciate a solution, thanks