Adjust settings for the side or Home button on iPhone
You can adjust accessibility settings for the side button (on an iPhone with Face ID) or Home button (on other iPhone models).
Go to Settings
> Accessibility, then tap Side Button (on an iPhone with Face ID) or Home Button (on an iPhone with Touch ID).Set any of the following:
Click Speed: Choose the speed required to double-click or triple-click the button—Default, Slow, or Slowest.
Press and Hold to Speak: Choose whether Siri responds when you press and hold the button.
Rest Finger to Open: On an iPhone with Touch ID, you can unlock and open iPhone by resting your finger on Touch ID.
Home Button Haptic: On an iPhone with Touch ID, you can choose how it feels when you press it. Tap Home Button Haptic, tap an option, then press the Home button to try it out. Tap Done when the option you like best is selected.
On an iPhone with Face ID, you can also use AssistiveTouch or use Switch Control to confirm payments with Face ID instead of double-clicking the side button.