This source says no:
View the full list of Xbox One X Enhanced titles. Xbox One X Enhanced titles are optimized to take full advantage of the 4K gaming experience.
www.xbox.com
As normal with Xbox model names its easy to get the wrong model name. AUTO HDR is NOT on xbox one X
AUTO HDR is ONLY on Xbox series X new console...
The OP is asking those who got the series X console EARLY if the AUTO HDR software solution on series X is any good...
Auto HDR will take NON HDR titles chroma and white balance and scale it to HDR10 Chroma and white levels...
Its a conversion thats not developer support needed. Think of it as upscale for colours and brightness instead of pixels count....
As with early console releases the full firmware and functions and bug fixes are Not released untill public release day so quality of functions can still change from Preview firmware to final public firmware...