How do I tell Bedtime that I am awake?
Solution 1:
There's no way to get what you're looking for other than what you're already doing.
Bedtime is made-up of two parts: Bedtime and Wake Up.
These are very easy to use but also very limited. It's not really designed, unfortunately, for one-off changes to the schedule.
I would recommend looking for a custom Shortcut that you can run to turn off the alarm when you wake up early. You can try Routine Hub and the Reddit Shortcuts sub.