It is clear that the 12-point gap from Liverpool is a very difficult gap for Arsenal, or even any team, to overcome because in the remaining matches Liverpool will definitely produce good results and the EPL is their outlet because the UCL cannot be achieved by Liverpool.
And for Arsenal against Fulham, Arsenal will likely be more dominant at home and Arsenal also always have an impressive record at the Emirates, while Fulham come into this match with inconsistent performance at the moment.
However, this is still a crucial match and Arsenal really need to win this match, with a draw from their last meeting with Fulham being a must to win this match, if Arsenal lose or draw then Nottingham Forest can easily overtake Arsenal.
Fulham are an uncomfortable opponent, they have caused a lot of trouble to many teams, and they are good not only in home matches but also away, I would not bet against them. Arsenal will not be able to catch Liverpool, 12 points is too big a difference, and it is good that now there was a break for international games, Liverpool had time to recover after defeats from PSG and Newcastle, they lost two important matches and this could break them.