I mean it’s greatly exaggerated on Mercator but it’s definitely not tiny.

It’s bigger than Australia

That outline is like the entire continental shelf, or all the area where the glaciers are directly over rock (as opposed to having ocean in between), or something like that.

But if the ice weren’t there, not all of it would actually be above sea level:

If the ice weren’t there a lot of the other continents would also be below sea level