here's what you need to do: ditch the phone (you're not gonna be able to do it on an iphone, android is an exception), get a laptop, I recommend a basic dell computer with windows 11 on it (you can use a macbook but you're gonna be looking for a lot of programs that run off of arm64 and that's a major hassle), create vm (virtual machine), I recommend running kali linux as your os because it has a lot of pen tools (some however are outdated), and run with that.