Back tap doesn’t work with case

Hello NearlyNubile,

Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you're having issues with Back Tap. Try the steps listed here to see if they resolve the issue: Use Back Tap on your iPhone

"Turn on Back Tap

1. Check that you have the latest version of iOS on your iPhone 8 or later.
2. Go to Settings > Accessibility > Touch, and tap Back Tap.
3. Tap Double Tap or Triple Tap and choose an action.
4. Double or triple tap on the back of your iPhone to trigger the action you set.

You can even set a double or triple tap to trigger an Accessibility Shortcut to quickly access features like AssistiveTouch, Siri Shortcuts, Magnifier, Reachability, and VoiceOver.

Learn more

• Turn on AssistiveTouch to adjust volume, lock your screen, use multi-finger gestures, restart your device, or replace pressing buttons with just a tap.
• Ask Siri to quickly do everyday tasks with the apps you use the most by using Siri Shortcuts.
• Use Magnifier to turn your iPhone or iPad into a magnifying glass so you can zoom in on objects near you.
• Learn more about the accessibility features on your iPhone."

We hope this helps.

Cheers!

Hi NearlyNubile,

We are not seeing any indication that the Back Tap feature is guaranteed to work with every type of case. If you'd like, you can leave feedback for Apple to let their engineering team know about this so that they can look into it further:

Product Feedback - Apple

Cheers!