I do not understand your grammar. I am not sure how to navigate to that list. It is just a summary of tagged engines on itch. Since it reads game-development, I assume, if you tick your account to not only play but make games, you will see some links how to get started.
But of course it also has the side effect of showing known alternatives to Unity. But since Unity is rather broadly, exactly what alternative is usefull to someone, depends heavily on what kind of game and what platform(s) are planned. Engines with the keyword 3d are rare on that list. Bascially only Unreal and Godot, never heard of the others.