Two of the last three games were very tough for Arsenal (vs Liverpool and Newcastle). But this match is just a formality for Liverpool who have secured the EPL Trophy, perhaps the same thing happened when they lost to Chelsea last week.
The game against Newcastle is a bit tough, but the result of this game will not affect them anymore if they manage to beat Liverpool because Arsenal only need +3 more points to secure a ticket to the UCL next season.

In general, Arsenal is quite safe in the Champions League zone even though Arsenal cannot get full points in the three remaining matches. Because the top five positions have indeed been allocated to qualify for UCL next season so that this has given freedom to teams like Arsenal who are still in the runner-up position in the Premier League standings. And on the other hand, there is also truth as you said that Liverpool may not hunt for points again in the remaining matches because what Liverpool wants this season has also been achieved in the Premier League.