At best, if this legal theory had any merit, these states would have to nullify the entire election. Subsequently, those who won seats under the nullified election would also be voided. This is where things would go off the rails... how many would be hapoy to risk a redo?
Also, any state which made even minor election changes because of the pandemic or otherwise might find their elections voided as well, not just those Trump lost e.g. North Carolina and Texas.
I'm sure Trump loyalists would be happy to have a total redo, because "what your saying is, we have a chance.^.
I'm thinking the newly elected and re-elected would be changing their tune quickly.
Finally, if Trump lost again... this BS just starts all over.