It wouldn't have changed the outcome. Let's say Trump had been indicted for both in say February 2021, which is pure fantasyland.
Let's get to trial in 18 months, so that puts us in September 2022. And the conviction becomes final for appeal purposes after sentencing in say January 2023 (and this assumes a relatively sane trial duration of a month or less, which may not be a good assumption).
A pretty normal appeal takes a year to 18 months, so that gets us to January 2024. Then there's the Supreme Court, and let's assume they'll take it, so another year, plus. We're at, whoops, January 2025.
These would be fairly speedy for any federal criminal defendant that doesn't take a plea. It does not take into account the various unique defenses available to any former POTUS indicted for crimes occurring proximate to, if not during, the administration.
And, the presidential immunity question was a new one that had to be resolved, one way or another and by its nature would have required a mid-case appeal (interlocutory). Even had SCOTUS taken it on an expedited basis, and given a less bullshit ruling, that inserts a minimum six month delay in the middle of trial court proceedings, which puts us in June 2025.
It was fucked from jump assuming he was re-elected.