Extend pixel art image

An AI that would take a pixel art (for instance a 1280x720 map) and would extend it to the sides, possibly also take an input and improve the existing image.

There are image extending AIs but I haven't found one made for pixel art. It would be really convenient to have one. On an upper level, a one that would also finish animation sheets would be nice, but for now just a full image extension is enough.