Pence, like many old-school Republicans is a never-Trumper. He held his peace and didn't publicly contradict Trump but he was never a true supporter. You could always tell by his politically correct remarks when pressed. I don't know if he actively worked against Trump the way Paul Ryan (Speaker of the House for Trump's first 2 years) and Mitch McConnel did. They actively impeded Trump's agenda rather than working to implement it. In fact, Ryan pushed a number of Republicans to retire so that the Democrats could take the house. McCarthy who took the minority leadership when the Democrats took the house is also very much against Trump.
Trump came out of left field and surprised everyone when he won. Trump's win is a symptom of how p***** off the American public is at their "representatives". I don't believe Trump would win in 2024 because nothing has been done to fix the corruption that caused the 2020 election to be stolen. The cheaters know the mistakes they made and will have had four years to get it right. Why do you think the Democrats were so dead set against forensic audits? Certainly not because they thought their cheating would survive scrutiny. If they didn't cheat, why the big deal about preventing any examination whatsoever? Why destroy evidence? Why the full court press to keep any audits from happening? You know that they would have loved pushing the Republican's faces in the dirt if they thought that the audits would come out in their favor. But they couldn't control the audits so they couldn't risk letting them happen. In each case where a judge actually looked at evidence and allowed an audit to proceed, sufficient anomalies were uncovered which would have rendered Trump the winner had they not happened. But most judges including the Supremes (the "judges", not the singing group, but who can tell these days), rejected the cases on some version of "lack of standing" rather than insufficient evidence. If you don't look at the evidence, you can't be guiltily of making an unpopular judgement.
Republicans are not interested in changing the way Washington works. Trump was. That was why he won and that is why the Republicans hate him with a purple passion. They hate him so much that they were willing to let the Democrats cheat and Pence let them get away with it so he is dog shit as far as I am concerned. This was a serious mistake on the part of Republicans because they have identified themselves clearly as part of the problem rather than the solution.