Liverpool played well in matches without Salah and Manchester City played well without Kevin months before. The return of Kevin is helpful for Manchester City and it comes at times when Salah was absent in Liverpool. Anyway, Liverpool are still leading Premier League and hope that they will continue it.
Beyond Salah, they have two other injuries from Jota and Arnold who are both important players in their club. They must go through this hard time before these players return to their squad and it's very important as Premier League is going to last matches in the season. Any mistake now will possibly pay a high cost as Manchester City can take advantage of it and never give any chance for Liverpool to get a first position back.
Jurgen Klopp and Pep Guardiola are two coaches who have excellent skills as accomplished coaches. So we can always see that the two clubs they coach can always maintain their performance even though several important players are injured.
Man City can still maintain their performance stable even though Haaland is injured. And even a few weeks before De Bruyne returns. It's just that at that time Man City was not as strong as when De Bruyne and Haaland were there. but Man City is still hard to beat even without their two main players. Liverpool is also like that under Klopp's coaching.