From what I've seen, many of those companies tend to hire locally but allow employees to then transition to remote, as opposed to hiring a remote role initially. That allows someone who's already proven their worth to have more geographic mobility, but also gives a preference to local hires.

A fair number of the companies on the list are 100% remote and don't have an office or any sort of local setup.

Depending on where in the world they are, local hires just might not be available.