Worth noting that employees forced into similar situations should file for unemployment even though they resigned. It’s called constructive dismissal, which is basically when the company restructures your job and drastically changes it in some way. Like, for instance, changing your position from WFH to in-office, or cutting you from full time to part time.
From a legal standpoint, it is the same as them laying you off from your old job and offering you a new one with a modified job description. But if the new job position isn’t on par with what you were already doing, you don’t have to accept it and can file for unemployment instead.