What’s nice is that you just have click the 802.11r toggle in the GUI and it just works. No further advanced configuration needed for a home / small network.
Agree with all of krazeh’s responses. My two r7800 APs are setup like this, 80Mhz non overlapping and non DFS channels:
root@OpenWrt:~# cat /etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option channel '36'
option hwmode '11a'
option path 'soc/1b500000.pci/pci0000:00/0000:00:00.0/0000:01:00.0'
option htmode 'VHT80'
option txpower '22'
option legacy_rates '0'
option country 'US'
option beacon_int '101'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option ft_over_ds '1'
option ssid '*********'
option ft_psk_generate_local '1'
option key '************'
option ieee80211r '1'
option encryption 'psk2+ccmp'
root@OpenWrt:~# cat /etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option channel '161'
option hwmode '11a'
option path 'soc/1b500000.pci/pci0000:00/0000:00:00.0/0000:01:00.0'
option htmode 'VHT80'
option txpower '22'
option legacy_rates '0'
option country 'US'
option beacon_int '101'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option ft_over_ds '1'
option ssid '**********'
option ft_psk_generate_local '1'
option key '************'
option ieee80211r '1'
option encryption 'psk2+ccmp'