Most companies in the US are hiring workers at-will. There are no contracts and anyone can terminate employment for any reason. I don't think that would work in the United States for most non-contract roles. It might work for contractors and for people in Europe.
Look up "constructive dismissal". If WFH is in your contract and they try to pull this RTO nonsense, you can quit and it counts as a layoff -- they're on the hook for paying your severance.
