LibreELEC on a 7" Touchscreen (RPi)

For some reason this solution doesn seem to work on libreelec 11. It looks like the 1024x600p mode is not suppprted. Anybody a clue?

Does the display report a valid edid? ssh in and report output of "kmsprint" and "kmsprint -m"

Does it display an imagine using latest RPiOS bullseye image?