done here A Wireguard comparison DB - Hardware Questions and Recommendations - OpenWrt Forum
EDIT:
so a "proper release" is on maurerr.github.io/radxa-zero3e with kernel modules and update to distfeeds.conf for those
for openwrt mainline we need u-boot support so I'll request some help with that.
stay tuned 
EDIT2:
uboot mainline worked in Commits · Kwiboo/u-boot-rockchip (github.com)