It is possible to run Microsoft Make Code on a Raspberry Pi. But it looks like I can select a bunch of boards but not a Pi.
Is it possible to program the GPIO pins on the Pi by running Make Code on the Pi?
The Pi is not a supported board.
I have no idea if it can be a supported board as all the other boards seem to be microcontroller based.
I suppose you could try adding the Pi as a new board by following the documented procedure.