how do I sleep it using a new Magic Keyboard

Press Option and Command and the Eject (?) key at the top right of the keyboard.

Danbush10 Said:

"how do I sleep my Mac mini with a new magic keyboard?"

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Getting a Mac to Sleep on a Magic Keyboard:

Create a Shortcut to Sleep:

You'd have to direct yourself all the way to Sleep settings. Or you could create a custom shortcut to these settings: Create a Custom Shortcut on Mac - Apple Support

Danbush10 Said:

"I did, Thanks"

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You are welcome.

Excellent job troubleshooting!