I’m using the 802.11r Fast Transition and BSS transition options and all APs are called the same. However, Aurora is new to me. If you could expand while I also read about Aurora I reckon I can work it out.
My 2.4 GHz devices seem to only need 20MHz channels.
I’m running on channel 153 on a AW7916-NPD with Turris 7.1 without issues. Just make sure to install the kmod-mt7916-firmware package and to set your country correctly in the WLAN settings.