Ouch, there is no result on using the ls -R command it should show all folders and subdirectories. Actually, it's very hard to troubleshoot this issue without the device on hand.

Maybe even the dir command does not show anything?

Have you ever tried to check the folder directly without using a terminal shell? If you can then you can right-click the tar file to extract or open a terminal on that folder.

I can't think more about how to fix this but I have my last option I think you can try to install Bitcoin core through snap check the guide from this link below.

- https://snapcraft.io/install/bitcoin-core/raspbian

Hope this one will work.