Maybe due to lack of certification? Firm-/software not in place or too buggy to announce?
It is not uncommon for vendors to ensure hardware is in place before software support. Give Cisco as an example. Their latest Cat 9100 APs have support for BLE/IoT with the hardware already in place. If memory serves me right, it contains a ZigBee radio. However, even though the hardware is already in place, there is no software support as of yet (last I heard, at least)