Thank you very much for assistance.
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If the image was written correctly, perhaps your USB/HDD adapter is not supported by kernel.
Actually I am not using USB to SSD adapter in the Rock Pi 4B, I am attaching NVME directly to M2 slot on the SBC. And through this type of connection, Armbian OS is working. USB adapter is used only for writing the image into NVME.
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Try another imaging tool to confirm the issue still persist, also check if the FAT partition is active.
You may also test the latest LE 11 Nightly build from test.libreelec.tv and if the issue is still the same, use another USB/HDD adapter.
I tried following imaging tools:
Balena Etcher, Rufus,Win32DiskImager, USBImager. The latter two didn't recognize the SSD. So I used only Etcher and Rufus, and wrote latest LE 11 Nightly build, and same thing happened.
When inside LE boot console, the NVME is not listed in /dev.
Below you can find various screenshots:
1) The text that appears during boot
2) When I type "exit", LE logo appears
3) Contents of /dev
4) Contents of NVME as seen from Windows after writing the image