I need help with my screen it doesn’t turn on when I double tap

Hi la286,

Thanks for connecting with us here in Apple Support Communities. We understand that you're no longer able to tap your iPhone to wake the screen. Are you using a screen protector on your device? Have you had the chance to restart your iPhone since noticing this behavior? You'll want to make sure that you're using a supported iPhone model as well. Check out the following link.

Wake and unlock iPhone

Have a great day.