Paradigm Touchscreen App without the physical screen

I've only tried setting up the  Touchscreen app once, and it's when I had a physical touchscreen or two to use. With the long lead times currently being faced, could a touchscreen in the  LD config be used by the touchscreen app without the physical hardware? Either the touchscreen or PCCS is serving up the touchscreen to be used, and without that someone can't get to it without LD, right?