How to enable Sidecar on 2021 MacBook Pro?

The Sidecar preferences pane never shows up when my 2021 iPad Pro is connected over USB and the device does not show up in Control Center when on the same WiFi network. Both devices have the same Apple ID and bluetooth is enabled. I have an 8th generation iPad as well that does not show up, so the problem appears to be on the Mac's end. Handoff appears to be working fine as well. Any ideas that would be keeping Sidecar from enabling?

Tested on macOS 12.0.1 and 12.1 RC with iOS 15 and 15.1.

How to enable Sidecar on 2021 MacBook Pro?
 
 
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