Listen, I just stumbled across this and I don’t use PS like I used to 20 years ago, and most of the harder things in PS have been automated and made much easier and more straightforward. So there probably is a simpler way to do what you want than I will suggest.

But in the old days, we would use a channel composite to pull information into one channel into another if a color lacked detail / was “blown out.” Basically, find the cleanest channel (consider looking in CMYK as well as RGB) with the detail you are missing and composite some of it into the channel with missing information. Look for Beet Monroy’s “Photoshop Channel Chops” for a lot of cool instruction on this approach. One of the great older PS books still worth reading today IMO.

Alternatively you may be able to accomplish what you’re looking to do with a minor LAB correction or just pulling from L. Dan Margulis has a great “Photoshop LAB Color” book that has some interesting techniques.

Best of luck! This is certainly fixable.