There are federal penalties for falsely certifying election returns.
The Election fraudsters ignore that at their own peril.
County certification does not end the process. Ultimately it is the responsibility of the State Legislature.
Any election fraud relating to a federal election is a federal offense. Why hasn't Trump's Justice Department prosecuted any? You can't tell me that the 2016 and 2018 elections were squeaky clean while this one suddenly became crime central. Trump complained about fraud in 2016 and in 2018 so why didn't Sessions or Barr do anything about it?
County certification does not end the process. Ultimately it is the responsibility of the State Legislature.
Yes it does. The slate of electors selected on November 2nd according to state law is set. Without a judge ruling the election to be invalid then any competing slate selected by the legislature would be thrown out of court.