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

It’s bigger than Australia

Does that mean Australia is not the biggest island
Are continents islands?
The Australia thing is something we were taught in high school.

I think I remember being told Greenland was the largest island, while Australia was a continent

Something to do with tectonic plates

If you go by the geological definition, Australia is a continent, as is Zealandia. That’s right, New Zealand has equal geological footing with the entirety of Eurasia.
Zealandia - Wikipedia

Probably why they keep getting left off maps, jealousy.