The stuff that I ordered is still on the way.
As high as f**k, but I don't expect that they got another distro besides Armbian there, as I ordered from somewhere in Kediri with good ratings. I want to put #openSUSE or #Fedora there once got the help from the community.
@jimedrand use what works first. The most widely supported ones tend to be better than the other options.
@yonle I found the other one that could be worked on, like this one. And I improved on my own forked repo that modernises some of the older stuff from currently using extlinux to boot and still uses Legacy/MBR to using GRUB with UEFI support (and also moving the partition table into GPT). Here’s the forked repo that currently working on.
GitHub - nabakdev/S905X-ArchLinuxARM: Arch Linux ARM for Set Top Box (HG680P & B860H)

Arch Linux ARM for Set Top Box (HG680P & B860H). Contribute to nabakdev/S905X-ArchLinuxARM development by creating an account on GitHub.

GitHub