How to send selected items from Finder to Shortcut app?

Hi, I want to send selected files from any folder
that I previously selected to the Shortcuts app on
my Mac. Especifically I want to create a floating menu window
button that converts an image to PNG with an
action from the Shortcuts app when I pressed, it
will perform the action on the files I had previously

there is an action in the shortcuts app to get the selected finder files. I'm not on my computer right now, but maybe you can find it. Otherwise I'll post an example tomorrow