i tried to boot latest CoreELEC from SD and it stuck at Nexbox boot logo , after that i taken out the SD card
ti check the device tree i found all devices trees inside then i removed all and left “gxl_p212_2g.dtb” which the same file name that used to work fine for me in LibreELEC.
again tried and same result stuck at boot logo.
i tried again the tooth picker method didn’t boot , re-flash the SD card , an repeated every thing same result.
but back the old SD with LibreELEC it boots fine .
this was the missing part once i selected the correct dtb file for my device gxl_p212_2g.dtb and copied it to the root folder and renamed it dtb.img , it boots like magic now