Your reply was interesting and so I decided to do a quick little test - set of tests.
White printer paper on a black cloth.
1 - in a dark room using just the device flash
2 - Same room with an overhead cool fluorescent light
3 - Same room with indirect sunlight - once again this site said file too big to upload - used screenshot
4 - Outside with indirect sunlight, actual direct sunlight about 2 feet away. Site says too big - screenshot
5 - Direct sunlight. Site says too big - screenshot.
Interestingly all the shots involving sunlight this site says too big to load. Yet all are 3MB or under in size. HEIF in Standard.
Same shots using the OnePlus 12 and Galaxy S24 Ultra all show white on black. To my eye, on my iPad Pro, MBP, and lastly on my Galaxy 3 Pro, excluding the direct sun shot, all 15PM shots exhibit some aspect of yellow.
All 15PM shots used the Main Camera.
Appreciate the offer however I think I will see what the 17.5 actual shows. If I have the same issue I’ll likely take you up on your off. Thanks.