@TheOneGuy 

I think the emulator for the C6U must be wrong. Beside the DFS cannels it also allows to select the "802.11ax" wireless mode, which the hardware of the C6U definitely does not support.

Anyway, none of TP-Link's entry-level Dual-Band routers support the use of the "DFS" channels.

Furthermore, the channels 149, 153, 157, 161, 165 are not supported on the routers for European markets ("EU" printed on the label under the router).

If I am not mistaken, the lowest-priced TP-Link router that supports the use of DFS channels is currently the Archer AX53, whose selling prices start around 80 € in Western Europe.

  @woozle I understand the entry level and mid-range and high-end restrict differences but why not just enable 149, 153, 157, 161, 165 on EU routers? They are not restricted by government so other than artificial lock I don't understand the reason.

  @TheOneGuy 

Definitely a shame on tplink and definitely last time I buy!

  @Michaelllllllll Why can't they just be transparent and mention about availability of channels on different routers? If I live in a dense area with numerous neighbors broadcasting on same 5GHz wireless channels and I intend to purchase wireless router that has additional channels unlocked that I can use to avoid signal collisions then specify that on the package so I will know.