How to setup local ZHA quirks

[Hedda]

There is a step-by-step guide here that is probably a little easier to follow:

• Zigbee Guide: How-to add/setup local custom ZHA Device Handlers (also known as ”quirks”) in the ZHA integration

https://community.home-assistant.io/t/zigbee-guide-how-to-setup-local-custom-device-handler-quirks-in-zha-integration/683473

Zigbee Guide: How-to add/setup local custom ZHA Device Handlers (also known as ”quirks”) in the ZHA integration

If your new Zigbee device is not showing all expected feature/function entities (attributes) in the ZHA integration (native Zigbee gateway component that is built-in to Home Assistant), even after trying multiple times to re-pair/re-join your new Zigbee device to the ZHA integration, then there is a big chance that your new Zigbee device will either need a new custom ZHA Device Handler (also known as a “zha-quirk”) for that specific device model or modify existing ZHA Device Handlers (also known…

Also see here for an shorter/simpler less-detailed summerized guide:

Add a how-to guide for how end-users can use a custom quirk in ZHA