Victor Osimhen is among the top 10 strikers in the world right now, so I disagree with you that Victor Osimhen isn't good enough for Arsenal to sign him. If Arsenal doesn't want to sign Victor Osimhen, just know that he's not Arsenal's top priority at the moment, or Victor Osimhen will not fit into Mikel Arteta's tactics at Arsenal. Arsenal shouldn't waste their time chasing Alexander Isak because Newcastle United won't sell Isak to Arsenal because Newcastle United still needs more quality players to be a threat to top clubs in the Premier League.
Victor Osimhen would be a good signing for Arsenal because I see him as having the quality and instinct to score goals. Arsenal are missing a center forward and they need this figure quite a bit next season so signing Victor Osimhen could be a pretty good option for them. Alexander Isak will not be released by Newcastle so it is a waste of time chasing a player like this and instead the League will roll so Arsenal need to ensure the attack line for next season.
If Victor Osimhen is available why look at the potential in other players because previously Arsenal themselves also approached Benjamin Sesko from RB Leipzig but so far there is no certainty. If Arsenal does not take an alternative then it is feared that next season they will again fail to create a frightening attack line for opponents.