Importantly, the law authorizing this doesn’t authorize the president to reverse the ban. Trump has used it before too.
So reversing this likely means an unusual ruling from the courts, or getting congress to change things. Both possible, but take a lot more effort than simply issuing an executive order.
I find it amusing when liberals believe the rule of law applies to fascism, instead of being dictated by fascism.
Laws only matter if they are enforced.