https://apps.apple.com/us/app/procreate-pocket/id916366645
But just because something it is technically possible it doesn't mean it suited for it.
Wanna make music? Press the chord buttons to play a tone on the synthesizer preset that you can't modify!
Wanna edit video? Drag your clips into this timeline with 3 transition effects and a half-dozen compositing themes!
If content creation devices aren't the devices that create content, then what are they?
I think that's a very good question. It's clear that devices like that are useful for some form of content creation, but I'm don't know if the term to refer to them has been coined or not.
Intuitively, they don't seem to fit in the category we used to call "content creation", since that nearly always was synonymous with creation+precision, rather than "any kind of creation".
Have fun writing a novel, designing a presentation, remixing a song or making a video game on a smartphone.
The precision of editing they do allow is "good enough" for the average Joe.
Unfortunately, smartphones, due to their form factor, don't actually allow precise editing or manipulation of content - which is what is usually meant by the idea that "smartphones are devices for consumption, and not creation".
The same applies to text, to some extent. Yes, you can author a novel on a smartphone, but it's gonna be an excruciating process if you want to do any fine text manipulation at all.