Arsernal is lucky to be in this group, because I see it that no club will be able to defeat them. No matter how perfectly PSV plays, I don't think that they will be able to win Arsenal with the present form that Arsenal is. Aesenal will finish first in their group and it wouldn't be a big challenge to them.
We cannot say that no team will defeat Arsenal in the group because anything can happen in football, and irrespective of performance, there are injuries and fatigue which may be the reason Arsenal might be defeated in the group, but there is no doubt Arsenal will qualify to the next round because that is what their record has kept since the time of Arsen Wenger.
Sevilla performance has being poor this season and I can't say whether or not they will finish secong in this group, but hopeful with their European experience, it is possible for them.
Sevilla is known as the Europa League's giant due to their experience in the League, but this season, they are having a bad time because they have yet to win a single match since the start of the Laliga 2023/24 season, and they are now seated at the bottom of the table; with this performance, I don't think they can qualify to the round of 16 ahead of PSV.