Advanced Zigbee Troubleshooting on Homey

[Sharkys]

I would add few more links :

[HOW TO] Plan and setup your Zigbee network

This post is concerning The order of adding Zigbee devices to your Homey Pro/Bridge (AKA “Coordinator” or “hub”). Know that there is a best approach to in which order you connect your devices. You have at least three major category of devices. Which to connect when, that’s what I will dive into in this article. What are the issues? So, cutting right to the chase: The most common issues you will run into with your zigbee devices, is either unreachable devices or you’ve added the maximum of devi…

And Athom recommended approach :
HP19

Creating a stable Zigbee network with Homey Pro

HP23

Creating a stable Zigbee network with Homey Pro (Early 2023)

Last but not least - online calc to check Wifi interference (just in case you are not sure)

https://ostgardh.se/wifi_zigbee/