Okay, gave Logic a spin. Works surprisingly well on Mini6, not tested on Pro yet. Best DAW I ever have seen on iPad, remarkably well done, UX feels a bit complex but not more so than the Desktop version, perhaps even a bit more intuitive and playful. Being able to actually touch X-Faders and knobs is fun, might be better with some t/haptic feedback, might be better if the interface weren't as sterile as it is end offered a bit more emulated «studio machinery» look. As it is, it's pretty amazing that this actually works on an iPad, even though given the equipment you need to actually work as a musician I think you might as well work on a MBA/MBP. I used an iRig I/O keyboard and it worked fine, audio worked over the audio interface of the keyboard, it was bus powered, and of course the analog know of the keyboard did not work initially (you have to map them manually, I guess, must find out where to do that on the iPad). With wired headphones, great sound and no perceived latency at all. With AirPodsPro2 it basically does not work at all, you cannot play live with that kind of delay, it's a pain. You need an USB/Audio-Adapter oder an Audio Interface. Apple, bring back the 3,5 to make life easier. No idea if AU works and how to install them, time will tell.
Still, for 50$/y this is a steal compared to what Korg charges. Kudos to the Apple team for pulling this off, probably as a first step to re-working the OSX version (kind of like what happened with Number/Paper/Keynote) for Apple Silicon as well.
And, you basically can tell that this even would work on an iPhone with the modular way the interface is structured. It would be more nested, not as all-in-one, but should be workable. Just imagine playing with you iPhone on the go or plugging a guitar in & using Apples superb Amps and Effects...