How can back tap be made to function 100% of the time?

I have been using back tap since the 13Pro. I have double-tapped to lock the screen and triple-tapped to take a screenshot. I have now upgraded to the 15Pro, but the back tap problems remain from the 13Pro.

Sometimes it performs as intended with gentle taps; other times, striking the button with enough force also doesn’t start the functions; and occasionally, gently keeping the phone on the desk causes a triple tap. I haven’t discovered a reliable method for getting it to operate.

I’ve tapped on the Apple logo as well as the areas above it. The most of the time, tapping the corner of the camera island works, but it’s still not perfect.