They are already being developed at Tesla.

You mistake a few faked demos of remote-controlled mannequins for actual working android robots. The point of the Tesla robots comes down to pumping the stock, not colonizing Mars.

Watch videos of state of the art actual robots and try to draw a line from their actual abilities to building a city. On Mars. In an environment with no infrastructure, no people to repair them. Pure sci-fi fantasy at this point.

Humans are ready now, and already fill the operational requirements without the famous "Elon truth stretching" maneuver that we've all become so intimately familiar with.