@lavid has it correct.
I believe the only way to update the lights is to pair them via Bluetooth using the Smartthings App.
Good news is the app/process free.
Bad news, it’s slightly a PITA depending on how many you have to do.
@zimmra, I hope you can return that hub (unless you plan to use that as your automation platform)
I found big improvements with the firmware update with the Juno lights, and the lights legitimately did not seem to need to be factory reset. However, I still had/have instances where they go “offline” in ZHA and Z2MQTT, and needed to be power cycled, making them unreliable long term for smart bulb mode and zigbee binding.
I’m currently -slowly- replacing all the Juno’s in the house with a Gledopto ~4" RGB CCT tunable wafer downlight. CRI claims to be just as high, they don’t have the same options for a baffled regressed version, so I don’t love the look of them as much, but they seem to be rock solid at this point.
JD