I've just got a BE85 1 pack today. I set it up from scratch (twice) but there is no 2.4GHz WiFi channel. My WiFi scanner shows only 5Ghz If I add my spare DECOx20 all my 2.4GHz devices can connect to

I have two DECO X20 both ethernet backhaul connected. My DECO's have recently updated to the latest firmware 1.2.0 Build 20230612 Rel. 57820 with the IoT feature. Previously, my Smart devices have wor