Unsupported: dfs
See dfs for more info on Dynamic Frequency Selection (DFS).
MT7613 radio
The open source MT76 driver supports DFS, but does not contain the needed code yet to handle the DFS capabilities of the Mediatek MT7613 radio (see forum topic). As such, one is able to use only the non-DFS channels at this point (2021-02-22).
Devices with dfs unsupported status