So he says. But that's a stupid decision.
UFC 316 is O'Malley vs Merab, UFC 317 is most likely DDP vs Khamzat, UFC 318 is open for now (presumably July), and UFC 319 (August) is tenatively scheduled to be the Ankalaev/Pereira rematch. UFC 320 is in Mexico, and I doubt Islam fights in Mexico.
Where am I going with this? If Islam doesn't fight @ UFC 318*, then he's very likely to wait to fight @ UFC 321 or 322 in October or November, and after that he won't fight until after Ramadan 2026 (end of March 2026). And usually he waits 2-3 months after Ramadan to fight, to get a full fight camp.
That means if Islam gets his way and Islam vs Arman happens during Fall 2025, then Topuria will be waiting until June 2026 to fight Islam.