I gave it a try today and so far so good, it booted without problems LAN is working , wifi and BT is not detected but it was before also and i had same with armbian .. i never tried to look for some drivers as i am happy with the LAN
This is the image i tried from your link in the 1st post LibreELEC-RK3328.aarch64-12.90.1-a1.img.gz
Here is the dolphin log
https://paste.libreelec.tv/proud-dolphin.log
Hw dec is working as i played some 1080 video without any problem, 4K not really but i guess thats expected with this tv box.
Btw i made a image backup of my previous installation so i can go back to it if its something wrong here.
I will try to use this in the next days and see how it goes . If i could provide some more info for you pls let me know.
thanks a lot for your work !