Still at it and trying to post my XMAS family video. Premnier is wonderful with my Red....hence the biggest most popular recording device, the iphone 14, on the planet and they have not just a small issue but litterally fail dramatically. pretty sure my iphone timeline footage today looks worst than my vhs edit bay of decades ago...while on my i phone it looks cinematically fantastic. I guess Adobe decided not to test thier software on the single most used recording device that existon planet earth. I made them aware of this issue and it is ignored.
Then why do so many others have no problem whatsoever with iPhone video in Premiere?
It's because you don't have your color management set correctly. Which yea, can be a bit of a pain, but once done works.
I've tested a bunch of clips for other users they insisted Premiere couldn't handle correctly. For all iPhone and A7s...x and most others, it was entirely up to getting the correct settings.
I'd be happy to test yours, of course.
But with iPhone, it seems always to be setting auto detect log and tonemapping on, DCM on for all Macs and most PCs, setting Premiere's viewer display gamma correctly for your wants, and making sure you use an export preset that matches your sequence color management.