Hi bidD,
welcome to the Apple Community, where some of us do our best to help each other troubleshoot.
Sorry I'm no expert. Apologies if the ideas below are too simplistic for your level of expertise.
Would it help to "play" with iPhone's camera settings (advanced settings are on by default)
to see if a different setting (off) helps at all?
Change advanced camera settings on iPhone
https://support.apple.com/en-au/guide/iphone/iphb362b394e/ios
Adjust HDR camera settings on iPhone
https://support.apple.com/en-au/guide/iphone/iph2cafe2ebc/ios
Save camera settings on iPhone
(ie: so they’re not reset when you next open Camera.)
- NB: Exposure Adjustment: Save the exposure control setting (on iPhone 11 and later).
https://support.apple.com/en-au/guide/iphone/iph62000de98/ios
Hope there's something helpful here :-)