An example of a decent high ISO (12800) picture form our Canon Eos 6D mkII
I don't use photoshop or any other enhancement software other than Canon's DPP for our raw digital images
(do use Gimp for editing like scratch and spot repair for our analog photos)
So only basic lens corrections are used (when available) and all the standard in camera setting are applied to the images.
Fallow deer doe and fawn by Photobygms, on Flickr
Canon EOS 6D Mark II at 12800 ISO
Sigma 150-600mm F5-6.3 DG OS HSM Contemporary