As someone has said, Hemed gets better service from wide players - which we've had to do more of since Uli got injured. Uli plays neat balls through for pace, which Hemed does NOT have - Waine also benefits from Uli, and his form has dropped off since the injury.
Actually some interesting points in this article (about 10 days old), especially near the end.
Also touches on Hemed becoming more prominent with Davila out. "Ewing Theory'. But all a bit moot for next season if both leave.
https://theniche-cache.com/football/2021/5/20/welly-nix-envisioning-a-future-without-ulises-davila