I'm having huge difficulty with matter, however, I also have zigbee devices, none of which have been set up yet.
Should I try setting those up on the ZBT-1?
I assumed I would be able to, however I noticed while setting up Thread that it seems the ZBT-1 can be flashed with firmware for either Thread or Zigbee, so I'm guessing that it does not infact support both? (At least, not at the same time)
Do I therefore need to purchase a second ZBT-1?

its nanoleaf, you never know