I found a solution to the front camera issue with iPhone 15.
I recently upgraded my iPhone XR to an iPhone 15 pro and I was really excited about it, expecting it to be a lot better than my old XR. However, turns out the iPhone 15 pro is a big disappointment, especially the front camera. You hold your iphone in front of you and everything looks good, you take the picture and...it looks compeltely different from what you just saw on the screen before taking the picture. The picture looks grey, dull, grainy, and way to overprossesed. I honestly like my XR selfies way better than my 15 pro selfies. So I was thinking about returning my 15 pro and keeping my XR. There does not seem to be any real solution to this, I have tried everything (I thought), taking a screen-shot, using burst, editing the photo afterwards as people have suggested, but nothing seems to really work. The good news is I found a solution. So here comes the guide.
1. You go into settings and search for camera
2. Search for camera
3. Choose formats
4. Click on ProRaW & Resolution Control
5. It doesn‘t matter if you choose HEIF Max, ProRaw 12 MP or ProRaw Max (up to 48 MP) in Pro Default
6. Go into the camera app and turn the front camera on
7. You will se „RAW12“ in the upper right corner, make sure this is on
8. Take a photo
9. Click on the photo
10. It says RAW in the upper left corner now and not portrait
11. Now the photo will still look the same (overprocessed, grey, and grainy)
12. Now choose edit
13. And you will see the photo change and become that raw photo you actually took, it will now look like it did on the screen before you took the photo
14. However you cannot save the photo yet
15. You have to choose adjust and then choose one of the features (exposure, brightness, saturation) it does not matter which one you choose, then adjust to only 1
16. You will not be able to see an adjustment going from 0 to 1
17. But now you can save the photo
18. And there you go, you now have that raw photo you actually took without all that weird processing going on after you take the photo and it will look nearly identical to what you see on the screen before you take the photo (and it looks much more like my iphone XR selfies, just slightly better)
19. It might not be as sharp, but than can easily be adjusted if you edit the photo
So there you go. I am thinking about keeping my iphone 15 pro now, the back camera is very good. I hope this helps for you too.
(I still think videos taken with the front camera lack some color though, I haven't found a solution to this yet, other than editing).