We hired a pro photographer to take family photos last summer during a beach vacation. My wife wants to use some of the photos for a Christmas card and she bemoaned the fact that in all the photos, the beach and sky have been pretty much whitewashed out of existence. I told her I could fix them in Photoshop if the photographer could provide RAW versions. We’re talking about 15 photos here. Is this a reasonable request? I assume the photographer still has the RAW versions, but not sure. The photographer in fact has not responded to my request. Maybe photographer feels insulted or something.
You can ask, though I would question how professional the photographer is if they messed the images up that much and did not correct them before they gave you copies. So they may not have RAW files of the images. Expect they may also charge you for the files as well.