Like most things Biden, the truth is complicated and not on his side. His camp made many allusions to being one term in 2020, and he made various comments suggesting that news reports of one term had veracity. Now in the same fashion the establishment says he won the primary as the choice of the people (while they blocked supporting anyone else, look up the results where uncommitted aka not Biden ranked higher than his “opponents”), his defenders say he never explicitly said it as a definite so it can’t be criticized, and the myriad of News Articles saying one term from 2020 shouldn’t have been trusted.