i once heard somewhere that the shapes aren't copyrightable so as long as you change the name you're good? but maybe not since they claim on that page to have used a similar free font (Nimbus Roman No.9 L) as the basis
Fair Use only applies to the thing being critiqued/parodied. You can’t just violate a license because you’re critiquing some completely different thing.
Karla is a free font that's somewhat similar to the design of Meta's corporate font: https://fonts.google.com/specimen/Karla