

Hah, no worries. I think it’s just an unusual use case and… well, I recognized it because I’m obsessed with PiKVM lately and those things!
I’m not superknowledgeable on USB, but Linux has features to do this; they are called “gadgets” in this list:
https://docs.kernel.org/usb/index.html
I have used this to turn a RPI Zero into a virtual USB drive with these scripts: https://github.com/alexpdp7/rpi-zero-usb-iso/
Likely by searching the Internet for USB gadgets you might find good explanations about requirements. I know there are unexpected difficulties- I’m using a Pi Zero instead of a nicer Pi because… nicer Pis can draw too much power over USB and bork what they’re connected to. So be careful.

Is it an option? Can’t find it. (But GitHub is confusing and I’m old, so maybe there’s something?)