I have a set of Deco X5700 (couldn't find it in the model drop-down so chose X90 since it uses the same firmware version) and after updating to 1.4.0 Build 20250102 you can enable the 5GHz_2 frequency band for clients.

My question is if you don't enable the 5GHz_2 frequency band for clients, will that band work as the sole backhaul band or does the X5700 share the wireless backhaul over more than one band?