Interesting findings indeed.
Just a data point, on both my Wi-Fi 6 AIMesh systems (see sig for nodes backhaul etc), assuming the Network Tools, Site Survey is a reasonable determinant of the channels, the channels (2.4 and 5 GHz) I set on the main Router are the same as what is propagated to the nodes. Channels 1 and 48 on my remote network, 11 and 36 locally, for 2.4 and 5 GHz respectively.
Just a data point, on both my Wi-Fi 6 AIMesh systems (see sig for nodes backhaul etc), assuming the Network Tools, Site Survey is a reasonable determinant of the channels, the channels (2.4 and 5 GHz) I set on the main Router are the same as what is propagated to the nodes. Channels 1 and 48 on my remote network, 11 and 36 locally, for 2.4 and 5 GHz respectively.