Here is the patch to support Orange Pi 3 LTS ethernet NIC YT8531 http://ix.io/3PDm
Made from linux-sunxi 5.10 patches
git checkout 10.0
Put to projects/Allwinner/patches/linux/0053-motorcomm-driver-YT8531.patch
Then build and flash orangepi-3 image
You told me that in the end you got a pi3 LTS to be able to work on it, right?
Let's see if with luck you can make an image that works both wifi and ethernet.
Right now I'm using Kodi on the Android that comes with the board and it's going very well. But I'm not interested in Android, I would like to have Libreelec directly on my board.
Hopefully you can get it working soon.
From this moment I want to thank you for everything you do and help us.
By the way, I also have a pi4 LTS that carries the rk3399. I imagine that for this plate there will still be a long way to go until an image for it comes out.
The manufacturer should send several plates to you every time they release something new and thus be up to date on everything.
They would be the main beneficiaries because they would sell many more plates.
I tried your image on my Pi 3 LTS and Ethernet works but not fast enough to use. At most it reaches 16Kb/s and thus it is impossible to work with it.
Anyway there must be something weird because my board must not have the same chip as yours. I don't know which one is mine, but the wifi one is the AW859A.
Cheers