I did install the latest nightly build "LibreELEC-Generic.x86_64-11.0-nightly-20231006-a8a6f85.img" on a Beelink with a 7840HS and it work fine now. Thanks
i had an issue with the version 11.0.1 were i had to edit the sysconfig.txt to add the resolution and refresh rate. Else it would revert back to 480p but with the GUI sized for the previous resolution.