It isn't.
I don't know where/ why you get that perception, but they aren't.
The whole target SOC isn't supported at all (search this forum for 'lexra', if you want more details), neither in OpenWrt, nor upstream linux, binutils, gcc, musl, ... Adding support for this arch is of course 'possible', but a lot of work - and once there you'd have to deal with getting the wlan drivers to work in AP mode and using contemporary hotapd version, neither will be easy.