Nope. The power to choose electors is vested in the legislature not the Governor.
I’m not so sure about the Governor not being able to give the audit idea a thumbs down. Your logic based on legislative control of elections is correct but I found the following in another news report on the “audit”:
HARRISBURG — Top Republicans in the Pennsylvania Legislature on Friday called for Gov. Tom Wolf to launch an immediate audit of the 2020 election, citing among other things the “unprecedented” 105,000 provisional ballots that were issued.