I tried the reset it doesn't work on my iPhone XR. Funny though my wife's iPhone 11 does not show the Bedtime alarm? So annoying.
P.S.
After resetting my iPhone XR, i tried to restore backup, and all **** broke loose. I got the dreaded Startup Logo Loop. In order to reinstall I had to unplug iPhone, press quickly Volume up, then volume down, then hold right side button until the logo appeared and then disappeared, and then my iPhone showed a connection to USB, so I had to connect it, and then open up iTunes, and reinstall iOS 14 from scratch, and then restore from backup.
It wasn't fun. Oh and in the end, that stupid Bedtime alarm is still there. Why on iPhone XR and not iPhone 11?