To be honest the “Wyze is not an international company” excuse is wearing thin. Wyze may not be, however US customers travel internationally and when they are away from home is one of the more important times for wanting secure access to their cameras.
So implementing a security solution that does not scale (case in point the fiasco from last night) and only reliably works with a US phone number is foolish. When I travel to Singapore to visit family I swap SIM cards and have a different number. SMS authentication is not functional then. And no I am not an edge case. Lots of folks based in the US travel for business or pleasure.
What baffles me is setting SMS authentication up is actually harder and more costly than an authentication solution. Unless of course they just outsourced it. In which case it’s not very secure is it?