No, my understanding is that the MAC address is always visible, even on wifi networks in WPA/WPA2 personal or enterprise mode.
Also, I believe modern phones randomize their MACs when they scan for networks, but use their real MAC when they connect, and that's visible to anyone within listening range.
Btw, most "guest" wifi networks rely on MAC-based access control, using these same publicly visible MAC addresses.. it's an inherent weakness of the wifi standards and I think the main reason why devices can't randomize their MACs when actually connecting.
Also, I believe modern phones randomize their MACs when they scan for networks, but use their real MAC when they connect, and that's visible to anyone within listening range.
Btw, most "guest" wifi networks rely on MAC-based access control, using these same publicly visible MAC addresses.. it's an inherent weakness of the wifi standards and I think the main reason why devices can't randomize their MACs when actually connecting.