Sleep app not available on my Apple Watch 5

Hello and welcome to Apple Support Communities, Epper.

If we understand your post correctly, you'd like to track your sleep on your Apple Watch but you don't see the option. We’d like to help. This feature is not controlled directly on your Apple Watch. Instead, it is handled on your iPhone using the Apple Watch app and the Health app.

First, you'll need to set up Sleep on your iPhone:

"Set up Sleep

Getting enough sleep is important to your overall health. The Health app on iPhone can help you set a sleep goal, and track your progress over time in meeting that goal.

1. Open the Health app on your iPhone.
2. Tap Get Started under Set Up Sleep1, then tap Next.
3. Follow the onscreen prompts to establish:

• Sleep Goals: Set the number of hours you'd like to spend asleep.
• Bedtime and Wake Up times: Set when you'd like to go to bed and wake up.
• Sleep Focus: To reduce distractions, iPhone can simplify your Lock Screen and turn on Sleep Focus at your scheduled bedtime. You can also give certain people or apps permission to notify you. Learn how to customize a Focus.
• Track Sleep with Apple Watch: Wear your watch to bed to track your sleep. This option is available during setup if you've paired your Apple Watch with your iPhone beforehand. If you pair your Apple Watch after setup, you can still turn on Track Sleep with Apple Watch later."

Also, please note:

"If you paired your Apple Watch after completing Sleep setup, you can still turn on Track Sleep with Apple Watch. In the Watch app on your iPhone, tap the My Watch tab, then tap Sleep. Then tap Track Sleep with Apple Watch to turn on this setting."

See the full article for more details here:

Track your sleep on Apple Watch and use Sleep on iPhone - Apple Support

Let us know if that resolves this issue for you.

Thanks for using the Apple Support Communities.