I take Biden at his word when he said during the primaries he'd serve one term.
Wel,l you can take him at his word on this later statement then...
President Joe Biden on Thursday(3/25/21) said he expects to run for reelection in 2024 with Vice President Kamala Harris on the ticket.
"The answer is yes, my plan is to run for reelection," Biden said at his first presidential news conference. "That's my expectation."
So you can take him at his word on this. He will run unless he is physically unable. If he doesn't he and the party will endorse Harris. This isn't just speculation.
Trump has also said he will run if he is healthy. 82% of Republicans want him to run.
Republicans are going to make the election in 2022 about Trump and the stolen 2020 election. About government overreach during the pandemic, about the border crisis, and about Biden's fading mental acuity.
You've been in this game long enough to know what's going to happen.