Arsenal has qualified for the semifinals and is also maintaining their first position in the EPL. It's an impressive achievement so far, and they must handle the pressure smoothly at this stage. Things won't be easy, and there's no room for mistakes. They're so close to success and must seize the opportunity to win.
For the position in the EPL they are still possible to maintain it at this time but to qualify for the semi-finals at this time Araenal is still no guarantee for that because however at this time leg 2 is still a determinant to be able to determine whether they can qualify for the semi-finals or not because both Arsenal and Bayern are still uncertain who will qualify because both still have the potential to be in the semi-finals especially the score is still a draw so anyone still has a chance in the second leg later.
But talking about achievements, this season Arsenal are very competitive and indeed it must be appreciated considering what they have done this season where when they still survive in the race for the EPL and Champions League it needs to be appreciated until now.
I don't understand what OP means by saying that Arsenal have qualified for the semifinals, because in the first leg they only achieved a draw when they hosted Bayern Munich and they have to play a tougher match by facing Bayern Munich who will play at their own headquarters. Is there another semi-final that OP is referring to?
Their journey is still very difficult to get to the semifinals, they have to fight hard at home to their opponents to be able to have a place in the semifinals of the Champions League this season. The fact is that they also failed to win in the first leg, which makes them uncomfortable because whether they like it or not, winning is something they must achieve.
Bayern Munich has an advantage because they will play in front of their own supporters. Even though they just experienced defeat at their own base when they were beaten by Borussia Dortmund, they will definitely learn from their mistakes and don't want to repeat them.