The shape of the Ozaru was little explored by Goku in Dragon Ball. The warrior didn’t even know that he had that ability, until he saw Vegeta transform into The first arc of Dragon Ball Z, the one with the Saiyans.
He could never master it, he didn’t have a chance, until he does it in a part of the story that, although it is official because Toei Animation made it, is not part of the canon: Dragon Ball GT. They call that transformation to which we refer Ozaru Dorado and it is the previous one to the wonderful Super Saiyan 4.
That moment where Goku is conscious for the first time while he is a giant ape is simply spectacular. And when Super Saiyan 4 arrives, it is even more so. Now imagine that this same thing happens, but in Dragon Ball Super.
Instead of having the Super Saiyan 4 flavor, what we do with the giant ape transformation is that it’s done in the Ultra Instinct style. That was what a follower of the series did, with design skills and left this brutal Fan Art as a result.
according to review 3D gameyes, this is a work by Gillbert, posted on Pinterest. It can be seen, as you can see in the image below, how the look of the giant monkey appears, but painted white, a symbol of essential light in Ultra Instinct.