Ahoy! Yep, Resetti is not (easily) compatible with Pico W as the wireless module gets in the way. It is possible to make it work though by rotating it 180 degrees (so it overhangs the side of the board). It's also possible to mount it on the underside of the board - the outer pins on Resetti need to make contact with the Pico W's GND and RUN pins, but it doesn't matter which way round they go.