I'm not saying Liverpool can't play well without Salah, but with Salah, Liverpool will certainly be better able to maximize their attack patterns. Salah is an icon for Liverpool so far, so when the team plays without his presence there is something different.
The strength of Liverpool's attack line will not be completely good without Salah, especially in tough matches Salah is really needed. I know Nunez, Diaz and Gakpo can play well, but Salah is a player who can bring a lot of change to Liverpool's attacking game.
With Salah's absence, Liverpool has still not lost a game. There is a hot player and finisher for the club that is filling well into the shoes of Salah, Diogo Jota who has scored goals for Liverpool. He is fast and very good on the ball, his goal scoring ability may be the advantage for Liverpool because even when he does not play a full game, he can come in, play a few minutes and still deliver the results expected from him. On the other side, Chelsea are also now scoring with the chances they create, so there is much chance that Liverpool goalkeeper will also be tested a lot.