I am using the latest armbian version on the Rockpi-s Armbian 21.08.2 Focal with Linux 5.14.5-rockchip64. I used to be able to set the MAC address in file 'Wired connection 1.nmconnection but this does not seem to exist any longer in the ETC folders - but does exist in run/. Changing run though - it just resets. The default MAC is ether d2:16:57:5c:27:27. I also tried to change at /boot/armbianEnv.txt and did not try interfasces as managed by NM.
Does anyone have any ideas as to where I can set the MAC address??