You are right. There will be no instant gratification.
For example, appointments with the consent of the Senate will remain valid because it is presumed the Senate would have approved the appointee regardless of who nominated them.
No court is going to declare routine actions signed by a Treasury Secretary invalid for such a reason.
And we already have a president who can undo any executive orders of a previous president whether or not legitimate.
We should also look at the effect of the “nullification of an election”. It may come down to disenfranchising to majority vote of the Electors/people.
It just does not seem as though there is any precedent to the vast criminal fraud of a president using a fake ID and thus nationality to win 2 elections.
What about this situation: shortly before leaving office, 0bola transferred hundreds of appointees who could have easily been fired by the incoming president, to civil service status? It’s royally screwing things up.