for all i know...
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=c9cb6411c1a70516d5922e88c45b338de041baba
this is only 2 streams, not tri-band, so definitely not what i'd want for anything mesh.
plus 16 MB flash is meager. i'd look for something else.
in general regarding xiaomi, please read this: