I'm not surprised that such a policy change would sweep up cases that used to be the exception. If HR allowed you, or pre-pandemic remotes, or specially-designated people, or whatever, then a separate class of workers would be created, and it could kick up resentment to the backtracking on remote work in the first place.
Such is the blunt instrument of HR policy.
I had a colleague at a former employer who was in a very unique situation, and was lifelong remote work--even when that was hard, back in dial-up days. Her management supported her, meaning they went to bat at regular intervals as she was always nominated for the layoff-du-jour, but they said they needed her.
She was the department's key SAP expert, and had been there since the migration from legacy mainframe. So even outside SAP experts had to learn from her, because she knew all the configuration, customization, and policies around our implementation.
Does your management have your back in this? Do you have a unique skillset or knowledge which would be difficult and slow to replace? If not, then this could be a real problem for you. But you can either sweat it out until March, or bring it up with your supervisor now, and work with facts. Maybe that means you plan a goodbye, as unjustified as it sounds. But maybe it means your management intervenes in time, too.