If you have anything later than an iPhone 8, then you no longer have a physical home button. Sometimes you might miss it. By going to Settings --> Accessibility --> Touch and turning on AssistiveTouch, you can get a small circle on your screen that you can tap to bring up a shortcut menu to various options. You can also assign different functions (like taking a screenshot or locking your screen rotation) to different presses of that button, like double-tapping or long-pressing.
It's not quite like having a physical, clickable home button, but it can help if you're tired of remembering how to swipe to get to where you want to go.