This is my opinion only. I believe that if Pence had not certified the election, where would we be?
We would still be trapped in the deep state, with Trump's power neutered to a certain extent. There would be NO PATH to draining the swamp.
Trump does not trash Pence AT ALL! He doesn't praise him. He doesn't even mention him. Do you really think that if Trump had been counting on Pence, he wouldn't be pulverizing him at every turn since 1/6?
Pence has been very quiet about Trump. Pretending to get ready for 2024.
Again, this is just my opinion.