How copy file to clipboard using python or CL to paste it using STRG+V later on?

I am trying to copy (using python or a CL command which I then can call using python) a file to the clipboard to later paste it using STRG+V. As far as I understand it, files are not "moved" into the clipboard, but rather the clipboard holds the path and an argument/flag that tells the OS "this is a file". I am happy with a linux-specific answer, but a universal answer would be the cherry on top.

pyperclip

Is not a solution, because it doesn't allow to copy files, just strings.

xclip

Is not a solution, because it only copies text

xclip-copyfile

Is not a solution, because it only copies to the X clipboard, not the clipboard. While xclip offers the option -selection clipboard (but only copies text), xclip-copyfile has no such option.

Using find

find ${PWD} -name "*.pdf"| xclip -i -selection clipboard -t text/uri-list

is a command described here: https://askubuntu.com/questions/210413/what-is-the-command-line-equivalent-of-copying-a-file-to-clipboard#answer-210428

But I can't replicate copying files with it and therefore assume that it is not working for all files.

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