I'm currently remotely working for a company where the remote part of my hire was a sine qua none condition. Everybody knows this. We are several people for whom coming to the "back" to office (to the extends that coming to the office always was exceptional) is not practical. During onboarding, we are told that the company will help you and find accommodations if you move to another country (though if we can choose a country where there already are people working for the company it would be better). The company has been already, de facto, split in two countries (in which there are offices). The company recently bought a smaller office because people didn't come as often / as many. The company actually could not handle everybody coming to the office at the same time anymore. At this point, a "everybody in the office from now one" would be highly unexpected.
Someone mentioned contracts, indeed my home is one of the two places where I can work from. And actually they don't care, I could work from anywhere as long as I'm reachable and I can work in good conditions as long as they are concerned. Of course, if I hurt myself and I'm not at one of the two places, that would be on me, insurance-wise.
There are larger companies that almost certainly have a longer history of being more remote-friendly than most, if not all, of the West Coast companies. But there are no guarantees anywhere.