Mohamed Salah is still one of Liverpool's top performers, a prolific scorer with experience in the attacking department and intelligence and technique.
He is still quite fit for his age, so he shouldn't be out as he is still fit to play football. Being the main attacking player in Liverpool team and he is a very hardworking player, the coach of the team is still quite satisfied with him.
The opponent that Liverpool will face in the next match is an opponent that will not be easy for Liverpool so the Liverpool team will definitely play their main players including Mohamed Salah because as you said that Mohamed Salah is a player who is still very productive in terms of scoring goals and also in terms of providing passes to his teammates when there is space for it. So I also don't think that he will be absent in the next match in the Champions League because he is still very much needed in the current Liverpool squad.