None of the images from https://www.armbian.com/rockpi-s/ work (neither minimal nor cli).
I tried writing minimal image onto SD NAND and tried booting both cli and minimal from SD card.
I tried 2 different SD cards too.
Board was connected through UART0 to PC and while I get output when I use rkdeveloptool, there is no output when trying to boot normally.
However, latest image from https://github.com/radxa/rock-pi-s-images-released/releases works (rockpis