Using 2 sticks, I installed libreelec on the 2nd stick. (Please do not confuse this with USB installer.) But I can't boot from the 2nd stick on a newer PC. (The USB boots fine in 2 older PC's, which suggests USB stick isn't the issue.)
When starting the PC, in the boot mode, I cannot see the USB in the UEFI options. It only shows up in the USB legacy options. I think this is the issue. Does anyone know how to make Libreelec USB appear in UEFI option?