Hi,
I haven’t tested extensively, so test on your own, but so far
coreelec-ng seems to work on
Beelink MXIII-II,
provided a newer firmware from a different manufacturer is flashed. The latest is and probably the last firmware for this deice is "113MO ", but because of some old bootloader ,ng builds cannot be installed in internal memory. Installing a firmware that was for android 7 fixes this.
I have followed instructions from this post,
flashed the suggested firmware and it seems to work, (wifi and bluetooth as well).
If anyone wants me to try any specific functionof this box, pls ask. I don’t have an ir remote.