Every tech company was forced into remote working, suddenly now every tech worker is (really) competing on the global job market, and the market is adjusting to the new offer/demand. That’s my theory.
Yes, there are some companies who have changed to fully remote and now hiring people from anywhere. There isn't enough of these companies to make even a small blip in the global job market.
The vast, vast majority of companies are still hiring people locally.
I think only recently have we seen companies adopt actual long term remote policies since initially the intent was to come back into the office. Also, I think it’s probably closer to a regional or national market at most. Most companies won’t just let any employee work from anywhere due to tax laws. For example, I can currently live in any state but that state has to have my company incorporated in it(which is about 25 states).