I found this searching for a way to clear RAM memory from the iPhone 11 Pro Max. It’s a bit tricky but it does work. First you need to go to your settings, and under Accessibility and under “Physical and Touch”, turn on “Assistive Touch”, which will then show a virtual home button on your home screen. After this, go to Settings again and then go to “General” under settings and scroll Down to the very bottom of the screen where it shows “Shut Down”, select this, which will then bring up the power off and cancel option on the screen. You then press your virtual home button and it will bring up home at the bottom center of the square. Hold the home button until your screen comes back up with either asking for your Passcode or returns to the home screen. This should clear your RAM memory and make the phone a bit faster. Sorry for such a long post and if anyone has a better way of doing this on an iPhone 11 Pro or 11 pro max, please post it here. Good day to all and God Bless.