https://wccftech.com/how-to/how-to-force-restart-iphone-11-iphone-11-pro-in-case-it-freezes/

There are several instances where your iPhone will just freeze and will become unresponsive. While there can be several reasons for it, the primary and most suitable solution will be to restart your iPhone. Since Apple has launched a trio of new iPhone 11 models, including the iPhone 11 Pro and iPhone 11 Pro Max, it will be wise for you to remember how to force restart your iPhone 11. If you’re unfamiliar, we will let you know how-to.

Since the launch of the iPhone X two years ago, Apple has removed the Home button on the device, paving way for Face ID to become a standard when it comes to unlocking the device. With the Home button removed, there are slight changes in operation to force restart your iPhone 11. However, do not be alarmed since the method is still present but it is performed a bit differently than before.