Replying and even quoting myself — because I found the solution (after trying around with those sdcard.imgs from the releases: found out that on the screen a login never appears and had to ssh as root to the VF2, but then wget never worked, scp also didn’t): VisionFive 2 Debian Image 202308 Released (latest) - #20 by bartoshe
Just boot the Debian Image 202308 and do it from within there.
Simple, isn’t it?