Pelosi would be POTUS if the election was voided. Trump would not be installed is my understanding.
I already said as much.
However, the election cannot be voided as the Constitution does not cover this outcome. What could happen is that under impeachment the President and Vice President could be impeached thus giving Pehosi the office. If there is enough movement from these audits a possible Amendment could come out of this that would cover this type of situation. Ratification would be years away though and the push back would be severe that it could be the trigger that Civil War would break out, more than what is already happening currently.