I’m using the ZHA integration. It’s been a while, but if I recall correctly, I just plugged in the ConBee 2, added the ZHA integration and pointed to the USB port address. In the video I linked to, Dr Zzs shows how to do it at about the 1 minute mark.
It was easier than adding the Xiaomi Multimode Gateway, which also wasn’t difficult at all.
I run home assistant core on an old Mac, so some things are a little different than setup on haas.io, which should be easier in every case.