I am currently using an iPhone 12 Pro Max, and when I go into settings to enable ProRaw, it says it captures in 12-bit DNG files. However, when I go to Apple's support page, there is something odd. It shows a screenshot of a 12 Pro or 13 Pro that says ProRaw captures a 12-bit DNG, but below that theres a screenshot from a 14 Pro that now says ProRaw captures a 10-Bit DNG file. So does that mean the 14 Pro has had its ProRaw downgraded to 10-bit?
support.apple.com
About Apple ProRAW - Apple Support (CA)
On iPhone 12 Pro and later Pro models with iOS 14.3 or later, you can take photos in Apple ProRAW. ProRAW gives you greater creative control when editing photos.