Previous to recent firmware on my C8P I saw LAN devices listed as avaiable for pairing in the homekit controller app, however I'm no longer seeing them? Has something changed? I have a garage door controller (Tailwind IQ3 V2.0) that has the option to connect via a POE "hat" rather than WiFi that should be able interface with homekit, but is not listed in the app.
Do the available to pair devices show in Apple Home (Add Accessory, choose More Options...)? If not, you have some general network issues or your devices are paired somewhere else. If they do then there may be a network issue between the devices and Hubitat.
If the devices show in Apple Home the Hubitat app has an alternate troubleshooting set of steps under "Pairing Instructions - READ THIS".
Perhaps try restarting the integration under 'Advanced'.
Solved. Re-enabled the prompt for connected devices on the HE home page (the one that prompts you to add integrations for devices you have on network). After reboot the missing LAN devices showed up in the homekit controller app. Not sure why..