How to build an up-to-date armbian ( kernel >= 5.10 ) for S905X3 ?

[hanguofu]

I am trying to build an armbian img. with mainline kernels for s905x3 tvboxes ( especially   h96 max x3   and X96_Max_plus )  . However , Since these boxes are not supported by armbian , I am wondering if anyone has even succeeded in building an up-to-date armbian without ethernet/sound issues ? Regards !