I’m not sure where to find the file to tweak in order to turn off auto image optimization. Can anyone point me in the right direction?
There’s no tweak to turn off image resizing, although you can reduce the number of potential image sizes stored by adjusting your theme to not request thumbnails (not really advisable for performance if your theme displays thumbnails or makes use of
srcset to adjust images sizes so they are appropriate for screen width).
What issue are you having with it?