SCOTUS does not have power to certify the EC results.
No. But what do you thinkg would have happened if Pence had been presented with a set of certificates and decided not to count and submit them as required by the Constitution? Do you really think the Democrats would have just said well shucks then I guess we’ll do some recounts and resubmit them and in the meantime Trump can just remain President?
It would have been a constitutional crisis and the country would have been outside of the law for the first time in history. With no precedent the only arbiter that would likely have decided the issue is SCOTUS. And they would have found that Pence failed in his duties and let’s just say, forced him to do so or done so or appointed someont to do so on his behalf.
It would have been a mess and by following the Constitution Pence avoided it.