How to sleep Apple TV with HomeKit

It would be much better to use the sleep function on the Apple TV box

Put your Apple TV to sleep:

After a period of inactivity, your Apple TV automatically goes to sleep. You can also put your Apple TV to sleep with your remote or from Settings:

• Apple TV 4K or Apple TV HD: With your Siri Remote or Apple TV Remote,* press and hold Home  for three seconds to bring up Control Center, then select Sleep . Or select Sleep Now in Settings.
• Apple TV (3rd generation and earlier): With your Apple Remote (aluminum or white), press and hold Play/Pause  for five seconds. Or select Sleep Now in Settings
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https://support.apple.com/en-ca/HT201836

Automations with Apple TV only give the option to play music, then turn off. This is done on your iOS device via the Home App

I agree

You can tell Siri via the HomePod to sleep the Apple TV but you can’t run scene or an automation with the sleep command. I have resulted to setting a Siri shortcut that sleeps the Apple TV and triggers a scene in the Home App, it would nice if it could just be done without the need for Shortcuts though