Define ‘right past it’. If it cannot detect your upper body or face and you have it set to human only, then nothing happens.
Aside from that, upping the sensitivity does indeed make it pick up motion from farther away. It will, in general, pick up more motion. This means that if the doorbell is too busy doing detection work, it will scale down detection to ‘save battery’.
Settings are lvl 3 and all motion.
I just walked right by it (the camera 90 degrees to my left) to walk the dog, distance app. 0.5 meters it did not detect me.
On my way back (camera to my right) it did detect me…