directory/folder completion not working on virtual drive

I think I'm trying to do something pretty simple, and I know that it works in CMD, but it's not working in TCC. Maybe someone can suggest what I'm doing wrong.

I have a virtual drive P (a cloud storage service virtual drive provided by pCloud), with folders in it. From a TCC prompt, if I type a letter or two of a directory name, I want to use the TAB key to complete the directory name. Tab completion of partial directory/folder names occurs transparently and perfectly on the C: drive...

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