What would happen if it was now discovered that Trump,

for whatever reason, did really win the 2020 election?
Suppose it was found out that there really was election fraud and that Biden didn't get the legitimate votes he supposedly got to win.
Assuming he would be removed from office is a give in, but what about all the executive orders, financial pledges and support to other countries, etc, etc?
Would all Biden has done become null and void?