How deep are you in the ESP32 dev? I've found image rendering (the display is LCD, not eInk) to be less straightforward than anticipated.
In my case, massaging images into a specific size and format prior to sending them into the ESP32/Display is easier and more reliable than trying to have the ESP libraries display any arbitrary image.
In my case, massaging images into a specific size and format prior to sending them into the ESP32/Display is easier and more reliable than trying to have the ESP libraries display any arbitrary image.