After Moh Salah absence due to injury, Manchester City has more opportunities to catch up with the 1 match postponed. 5 points is a bit tough but Liverpool also need to win every game without Moh Salah and in any case I think that's a difficult challenge. The rivalry between the two will continue until the end of the season, but if Manchester City has Haaland back in their squad, every match will automatically become easier. Because there is Kevin De Bruyne beside him to guard and ensure Haaland scores goals.
It doesn't seem to me that Moh Salah is even absent in this match. They don't have any EPL matche now until the end of this month which is Chelsea and I don't think that's going to be a problem. They will do a cleansheet on Chelsea or worse that can happen is over 2.5 with a max of 3 goals, 2 will come from Liverpool in the early time of the match and 1 will come if Chelsea struggle and perhaps Liverpool show signed of tiredness and didn't defend as they needed to do.
From now till the end of February, Arsenal is the only big team that I think Liverpool need to fear because of the recent losses they have had and they are home, so they might be hot but they lost to Liverpool in the first leg, they might lose this as well.
For Arsenal still can't join the title race, and I hope Arteta realizes that. It would be better for Arsenal to think of a way to maintain third position so that it is not stolen by Aston Villa, whose existence this season really needs to be watched out for.
It depend on what they do in this second leg. If there attack is stronger and defend is 2x stronger than what they played few weeks back, then I expect them to win plenty of games but I'm not sure about what they will do for the strong team because West ham, Liverpool and Newcastle. These teams has humbled Arsenal in the last matches and they contributed to their lost matches.