Trump could reverse a policy directive from Biden after he takes office but, Sens. Elizabeth Warren and Richard Blumenthal are trying to highlight the issue.
Any road block they can put in place is a good thing, this guy has no business using the military on his own citizens but that won't stop him from trying
The only things Biden can do that would actually be effective would put our national security at risk. The military needs to be agile and responsive to any crisis. Making them ineffective against manufactured threats is making them ineffective against real ones.