Are pop rivets strong enough for this use? The A above middle C vibrates 440 time per second when played, and the air is forced through a tiny opening just about the size of the reed, so there's a fair amount of force involved. Accordions are loud!
Pop rivets are soft compared to brass or steel, so might the vibration be enough to deform the rivet so that the reed becomes loose? That would be a musical disaster, as it would buzz horribly.
