In fact, with Liverpool being eliminated from the Champions League competition, they will be more focused on winning the Premier League title this season.
Liverpool are already quite comfortable at the top of the standings with a 15-point advantage and also no other team can be consistent so that Liverpool is without any pressure so there is no need to doubt that Liverpool can win the Premier League title this season, they are now really very confident to win the EPL title regardless of their elimination in the Champions League.
Seriously. Liverpool is going to focus more on the Premier League competition at this moment because this is one of the competitions that they have been struggling to win this season, so now that they have been eliminated from the Champions League, they will focus more on the Premier League so they can get the title this season. They have already gone far in points, as you said, and no team can catch up right now. Arsenal is not that promising in their performance, so I’m not sure if they will be able to do that. 15 points is a lot of points.
Arsenal is very inconsistent and would not be able to close fifteen points unless the unexpected happens. Arsenal would also be distracted by the UEFA Champions League since I assume they would qualify for the quarterfinals since they have a seven goals advantage. Newcastle is a good side with a dangerous attack, Liverpool would have to put more effort to win that Cup. Arne Slot would have to encourage his players to forget about the disappointing loss to PSG and focus on winning the Football League Cup.
Arsenal's current performance cannot give them first position in the Champions League, and as I said before, Liverpool's focus will now be on the Premier League, so right now any team that Liverpool meets in the Premier League is winning directly; there is nothing to stop that because they are not under pressure anymore. PSG's defeat will not make them weak since they still have high chances of winning the Premier League trophy.