I reached out to Binhex to confirm (the original creator of the iptables.sh script), and that is indeed true. However Binhex told me, if you remove mangle, it wouldn't be possible to connect to the Docker from outside the LAN network. To me personally it wouldn't be a big deal to...
I am not able to boot either of the images from https://www.armbian.com/sopine-a64/#kernels-archive-all I'm not sure if the serial is just turning off or the system is freezing. It does not connect to my router. Here is the serial output for for 'focal' image. Reveal hi...