I would imagine that the hardware on iPhones (touchscreen input, multiple cameras, FaceID) would make it much more challenging and probably not within the scope of the project (!). iPhones are also more locked down then Macs are, I believe there is no way to install an alternate operating system on modern iPhones. Project Sandcastle, a project to implement Android on iPhones, only got around to the 7 (and even then, it had poor support).
I would imagine that the hardware on iPhones (touchscreen input, multiple cameras, FaceID) would make it much more challenging and probably not within the scope of the project (!). iPhones are also more locked down then Macs are, I believe there is no way to install an alternate operating system on modern iPhones. Project Sandcastle, a project to implement Android on iPhones, only got around to the 7 (and even then, it had poor support).
Macs explicitly allow booting a 3rd party OS, which makes Asahi even possible in the first place. IPhones actively fight you if you try.