The heading says to restart the subsystem on its own before rebooting. Update > Hardware in the Omarchy menu has Wi-Fi, Bluetooth, Audio, and Trackpad. The chapter’s examples are a Bluetooth headset that will not reconnect, a trackpad that went dead after suspend, and sound that vanished when a monitor was unplugged.
Manual heading: My Wi-Fi, Bluetooth, audio, or trackpad just stopped working
Restart Wi-Fi, Bluetooth, audio, or the trackpad
Before rebooting, the manual says to reload Wi-Fi, Bluetooth, Audio, or Trackpad from Update > Hardware.