HDR+ is just the name of Google's implementation of image stacking (combining multiple shots into one photo, what all modern photos apps do). So HDR+ is the technology used within GCam.
If you use an app like the one described here for A52s:
There is any G cam available for Samsung galaxy A52s
forum.xda-developers.com
You even get two different implementations of HDR+ that you can switch between in the app:
- Regular "HDR+" which combines several underexposed (so too dark) photos into one.
- "HDR+ enhanced" which takes longer to take a shot, but as I understand then it will take pictures at different exposures (so one too dark, one too bright, and one just right) so that it can correctly display both bright and dark areas in the final photo.
For sample photos comparing the Samsung stock camera app and GCam on A52s, maybe I can just point you to my A52s user review. It's in Dutch, but you can just click on the pictures in it and the captions should be readable:
tweakers.net