Bro, you CAN'T be serious.
Islam only has 1 top 10 LW win. ONE.
He could fight Dustin right now, It'd be justfied. He could fight Gaethje right now, It'd be justified. he could fight Charles vs dariush winner, I'd be justfied.
He should already have a fight signed with Dustin or Beneil.
He has SO much work to do at LW, He should be fighting contenders this summer. there is zero reason he doesn't have a fight booked for june/july, Other than the UFC wants to save him for october.
Volk is a completely different story, He's on the victory lap of the FW division should he dispose of yair. But you could easily go with the winner of Emmet/Topuria after that, two top guys that volk hasn't fought yet, Topuria (whom I expect to win) is a younger undefeated challenger for Volknovski.
I will concede that i'd rather watch volk vs islam 2 than charles vs islam 2, but that does mean they should do it.