The vote totals from that election are...odd. Somehow Biden got about 28% more votes than any US election in history and about 24% more votes than you would expect in that election. That's way outside the error bars. As in 5 sigmas or more. Other than that, I have nothing but only because I don't go down this specific rabbit hole.

Trump also got a weird and very high vote total in the 2020 election. People just chalk this up to mail in voting. Perhaps, but the 2024 vote totals fell back into line with previous expectations on both sides for vote totals. Make of that what you will.