@Memnon If you get a chance have a look at each device, hub and extenders with a wifi Analyzer program.
There will be a ssid for the Main WiFi and 2.4Ghz/5Ghz/6Ghz signals, channels if on Auto, and an associated hidden ssid that only the wifi Analyzer will pick up.
Same for the Compatible wifi and you should see both on the Hub and the Extender, Auto is the one to allow them to drift about so in the 2.4Ghz band would be CH1,6,11,,, and on the 5Ghz starting CH36 onwards plus if 80/160Mhz wide then channel numbers vary by requirement, not sure how the EE Hub will report the 5Ghz values.
2.4Ghz is by far the strongest channel followed by the 5Ghz and finally by the 6Ghz.
1/6/11 for 2.4Ghz at 20Mhz wide
Channels: The 5 GHz wifi band has six 80 MHz channels (see
table right; 42, 58, 106, 122, 138, 155) BUT ONLY if you have
an AP that supports ALL the new DFS channels.
The SIX 5 GHz 80-MHz channels
Channel # MHz
42 36+40+44+48 5170-5250 OK
58 52+56+60+64 5250-5330 DFS
106 100+104+108+112 5490-5570 DFS
122 116+120+124+128 5570-5650 DFS, TDWR
138 132+136+140+144 5650-5730 DFS, (1)
155 149+153+157+161 5735-5815 OK
50/114/163 for 5Ghz 160Mhz wide
6GHz MHz Name AFC?
5.925-6.425 500 U-NII-5 YES
6.425-6.525 100 U-NII-6 no
6.525-6.875 350 U-NII-7 YES
6.875-7.125 250 U-NII-8 no
