So, first things first, you need to understand that APKs are like packages that contain an app's code, and they're not native to iOS. But, there are some cool workarounds that let you get APKs on your iPhone, like using third-party apps or jailbreaking your device.
Now, I know some of you might be thinking, "But isn't jailbreaking, like, super risky?" And yeah, it can be, but if you're careful and do your research, it can be a great way to unlock some cool features on your iPhone.