As far as I have heard, Osimhen is expected to be back after this national break ends. There is a statement made by the manager Okan Buruk regarding this topic:
beIN SPORTSHe says they just didn't want to risk Osimhen in the latest game because of his not being fully recovered. But he would be back by the next game. This is really good news for Galatasaray without doubt.
Because he already started to make important goal contributions. Unlucky him that he got injured right after starting to score his first goals.
As there is a Beşiktaş derby closing in too, they would really need him there.
But they should especially focus on their defense now just like you must have also mentioned already.
It's good news that Victor Osimhen's injury is not serious because, as most people observed, his impact in Galastataray is already visible. Without his threat to opponents' defense, the pressure usually falls back on Galastataray's midfield and defense, which has cost them a few points since his absence.
I know he would want it to come back as soon as possible, but it's wise to keep him away from the game against Antalyaspor to enable him to recover fully. There are still more important games with IF Elfsborg, Beşiktaş, and Tottenham, and his presence will matter a lot in these games. I am expecting to watch the match against the English side; it will be an opportunity for the Nigerian to show that Chelsea and Manchester United missed the opportunity to attract a world-class striker.