Okay, I found something that will hopefully be useful.
The Tronsmart Vega S89 device (it doesn't matter if it's Elite or Standard) is based on a Meson8 reference board type "k200" layout.
First, use this image to create the SD card:
LibreELEC-MXIII-1G.arm-9.2.7.img.gz
I found two devices with the same type, you should try this first:
meson8_k200_m8_2G.dtb
The downloaded file must be renamed to "dtb.img" and the existing one must be overwritten on the SD card.
Then try booting from SD card and check Ethernet connection.
If Ethernet still doesn't work with the first dtb file, you need to try this one:
meson8_k200_s82_2G.dtb
Display More
I tested the above image and replaced the DTB you provided, but it failed to start
Report the following error
rm:cant't remove ‘storage/.please_resize_me':read-only file system
PARTITION RESIZIMG IN PROGRESS
please do not reboot or turn off your libreelec device
Cycle restart, unable to enter Kodi
Libreelec-n200-ap6330 provided by you_ 2g.arm-9.2.6.img.gz, which can be started, but the wired network can't get IP, 169.254.xx.xx
Wireless network as long as I fill in China's NTP, I can use ntp1.ailiyun.com normally
Can you add S89 cable network card IC + ip101gr 10 / 100 Ethernet driver to n200-ap6330_ 2G inside the support, to achieve S89 start normal, Ethernet normal