1.) Needs to prove that he can beat the best
There is no debating that Allen is one of the best quarterbacks in the league. He is a major dual-threat who can win a game at any moment. With that being said, he has not shown to be the best quarterback in the playoffs.
In his first year in the playoffs with the Bills in 2020, Buffalo lost to the Houston Texans after Allen was rattled by the Texans’ defense in the second half of the game. The following year, the Bills advanced to the AFC championship but it was the defense who stepped up big in the divisional round against the Baltimore Ravens to win 17-3 (where the Bills scored just one offensive touchdown).
The only game where Allen took over a game and he was the forsure best player on the field was against the New England Patriots in the wild card round in 2022 where the Bills dominated the Patriots 47-17.
Allen has lost to Mahomes twice in the playoffs already. If he comes up short and loses this game to Mahomes again, he will be 0-3 in the playoffs and the same narrative will continued about how Allen cannot beat the best in the playoffs where it matters the most.