They're actively gutting the NLRB too, I doubt there will be any meaningful action out of that agency against antiunion activities no matter how blatant until at least Jan 20, 2029.
It is even worse than that. Musk is currently suing to argue that the NLRB is more-or-less entirely unconstitutional. There's a meaningful chance that labor organizing protections simply permanently end within the next couple years.
The unshackling will be one sided. I'm sure unions will still be forced by courts to follow all the old rules it's the companies that will get to flout union votes and retaliate freely without the NLRB.