This article explains how to enable an on-screen Home button in the AssistiveTouch feature on iPhones running iOS version 14 and earlier.
How do I get the Home button on the iPhone screen?
Newer iPhone models no longer have a Home button, but if that’s a feature you’d like to have back, you can add an on-screen Home button to your device using an AssistiveTouch feature. It’s not the same experience, but it can still be useful.
Open the Settings app.
Tap Accessibility. (iOS 14 and iOS 13)