Like it or not, the USCONT has no provision for declaring a certified election null.
None.
No standing.
States do, and have at times, but there were elections more messed up than this, like the 1876 one, where it was ruled once the electors vote, it is done.
Thing about it. Otherwise every US Presidential election going forward will be contested and overthrown in court. You will make the SCOTUS kingmakers.
Think about this. Every election forward will be determined by voter fraud if you don't allow enough time for audits and to create a case.
The fraudsters are the kingmakers.