Hi David, first thing to do is make your Conbee stick (coordinator) work.
You have to decide which of the 3 integrations (ZHA, deCONZ, zigbee2mqtt) you will use, and this can be a little difficult because all of them have pros and cons.
Some devices (sensors, lights) work with one but not with the other and same goes for the stick (coordinator).
I have used a Conbee with deCONZ but it was installed on another system because at that time when I started with zigbee, I couldn’t get the coordinator to work.
Since a few months I switched to a Sonoff coordinator with zigbee2mqtt (z2m is the most technical challenging one)
So you are using a RPi (Raspberry Pi): did you plug the coordinator directly into a port from the RPi?
If so, this is to avoid since the radios from the RPi will affect your zigbee stability.
You need to use a USB2 extension cable and plug that in a USB2 port.
I strongly advice you to read this topic: Guide for Zigbee interference avoidance and network range/coverage optimization
Under Settings → System → Hardware → All Hardware you should see the Conbee.
Also check your logs to see if there is anything regarding the device.
You also will have issues by installing/configuring 2 different integrations for zigbee.
Also this: the Conbee is strongly linked to deCONZ (same company) but depending on the firmware version it can work with other software.
Don’t update the FW to soon!