How do I turn off the bedtime reminder on my iPhone?

It appears that you may have the sleep schedule set to ON on your iPhone.

Open Settings ➡️ Focus ➡️ Sleep ➡️ Schedule (Next Schedule): Set this switch to OFF.

Axel F.

leo9939 wrote:

turn off this stupid Lulaby

Add or change a sleep schedule

• Go to the Health app on your iPhone.
• Tap Browse at the bottom right, then tap Sleep.
• Scroll down to Your Schedule, then tap Full Schedule & Options.
• Do one of the following: Add a sleep schedule: Tap Add Schedule. ... 
• Do any of the following: ... 
• When you're finished, tap Add or Done.

Add or change sleep schedules in Health on iPhone