I don't understand what you guys are talking about, cause from my understanding Arsenal have signed two players, Martin Zubimendi from Real Sociedad and Kepa Arrizabalaga from Chelsea, maybe fans are worried that they've not signed their main priority which is a striker but saying that they'll slow on the transfer window makes no sense, how about Manchester United that's only signed Cunha and still battling with Mbeumo deal? The transfer window is on and there's still lots of time for Arsenal to get a top 9, what they just need to hasten up on Sesko deal or move on since there's other Alternatives out there. Fans should be patient then if they don't sign a top 9 till the window ends then we'll know they're a very unserious team.
That means Arsenal are slow in terms of finding the player they need more because for the two positions you mentioned Arsenal have them. Arsenal should focus on finding a striker because they really need that player next season and now they are not doing that. Alexander Isak will not be sold by Newcastle even though Arsenal are interested in the player, and vice versa with Viktor Gyoekeres because Sporting set a high price so Arsenal stopped pursuing him.
Now the rumor is circulating Arsenal are making an approach to Hugo Ekitike from Eintrach Frankfurt or Sesko but also the same because they are too slow. That's what some people say Arsenal do not prioritize the players they need and if this time it fails again it might be difficult for Arsenal to get a striker they need.