Yuzu has a similar feature on their android release. I bet that’s the big reason why these emulators are on android and not iOS, the graphics hardware on modern iPhones is certainly capable.
Walled gardens, eh?
With a jailbreaked iPhone device, you can possibly install Dolphin through a separate package manager (Cydia, Sileo, etc.)
The caveat for enabling JIT support is you have to “attach a debugger” first. AltServer automates this process…provided your iOS device can communicate with it when launching the app.
DolphinIOS exists though it’s a fork and requires somewhat unfriendly steps to get installed just due to iOS as a platform.
https://dolphin-emu.org/blog/2021/05/24/temptation-of-the-ap...