It can definitely be hard to get a kid to pull away from that sort of thing, I think.
I was kinda similar as a kid, I was introduced to tech at a young age (though this was in the early 80s so it was very different stuff) and once that happened I was entirely glued to it. Took control of the family PC and pretty much everything else in the house. Getting me to do other things was pretty difficult. Not that I didnt do anything else, but still, I know I didnt deviate from my usual stuff very easily.
What did help though, and what still does help, is sorta combining the tech with the non-tech.
Like, drawing for instance. If you've got an iPad and either have or can get that pencil thing Apple makes, that can be a good start to drawing without having to necessarily buy a whole new device. There's a lot of options for specific apps on that thing, of varying complexity. From what you say it sounds like he'd enjoy the sorts of apps where the UI is mostly presented on the screen and you're expected to interact with it, as opposed to something like Procreate which hides 90% of it's functions.
One idea I've had just for myself in terms of keeping motivated with the non-tech art is to sorta then combine it, I can produce something digital, and print it out and combine that with the physical, my paints and markers and such. I havent actually done this yet, because I dont have a printer, but the idea sounds like a lot of fun. Maybe something like that, for art?
I wish I had better suggestions for you, but what I know of my own experience, and also from what I've seen of many others who are into tech in general (and I dont mean stuff like social media on a phone), is that it's just hard to pull them away from it, at any age.
And some things may prove tougher than others. Homework can definitely be an issue, most kids dont want to do that to begin with, so for someone with a tendency to hyperfocus on something that isnt homework, that becomes even harder to do. Pretty much just never did it at all myself.
One thing I will suggest though is to look carefully at any app you might give him before doing it. Like, the bit about educational games on the iPad. Educational games are really notorious for being terrible. The education part can be nice and all (or not), but if the "game" part cant match that quality (and almost all of them dont) the whole thing will just push kids away from it and make them less likely to even try something like that in the future. At a certain point, just seeing "educational" on a game/toy can just cause immediate revulsion. That doesnt mean there arent any genuinely good things of that type, of course. But there are so very many such products that mostly just rely on pulling in clueless parents to just see the "educational" label and buy it based on that without looking into it further. A very unfortunate and rather slimy tactic for sure, and also very common.