It's not that simple. The rule-making process is pretty well defined. It requires agency justification and legal opinion, public comment, pre-publication for further comment, etc. If the agency involved pursued the rule -making process by the book, the only way it can be just overturned is by Congressional Review Act. That's a simple majority, so it's possible. Prior to 2017, it had only been used once by Congress to overturn a Clinton era rule in Bush II's first term. I was involved in passage of two CRAs of a total of five passed in 2017. I don't think this issue has the juice to make a CRA.
The other way to overturn it is by the rule-making process. The same agency that just published this rule would have to start all over again first by explaining why the rule they just published is wrong, why their prior legal opinion was wrong and start all over: draft a rule,.issue it for pubic comment, summarize results, reissue the rule for comment and then face legal challenge. I have been involved in two of those processes and it is a long hard slog.
After he lost the 2010 midterms, Obama was very smart/sneaky and relentless about (frequently illegally) using agency regulation to achieve what he could not get through Congress. Since Biden is known for lacking original thoughts , and since his administration is heavy with Obamunists, it is reasonable to expect a similar strategy in the next few years. The problem for that strategy is that the GOP was relentlessly effective in federal court confirmations, so the rubber stamp kangaroo courts that helped Obama are not necessarily reliable this time.
We shall see.
