Ghost alarm on iPad

Hi 3pennies,

Thanks for posting in Apple Support Communities.

We understand that you're being awaken by alarm when you don't have any set. Check whether you have a sleep schedule in place. This will also wake you.

"Turn off all sleep schedules and alarms

After you create one or more sleep schedules, you can turn them all off at once. When all sleep schedules are turned off, scheduled alarms are also turned off.

1. Tap Browse at the bottom right, then tap Sleep.
2. Scroll down to Your Schedule.
3. Tap Full Schedule & Options, then turn off Sleep Schedule (at the top of the screen).
4. 
5. You can turn them all on again later.

Note: To turn off alarms you set in the Clock app, see Turn off a regular alarm."

Turn off alarms and delete sleep schedules in Health on iPhone - Apple Support

If you have nothing set for your sleep schedule, check whether you may have an alarm set from a third-party app.

Regards.