Has SpaceX mentioned an intention to do this?

@AndrewMcKnight Musk has
https://x.com/elonmusk/status/1900774290682683612
"Starship departs for Mars at the end of next year, carrying Optimus.

If those landings go well, then human landings may start as soon as 2029, although 2031 is more likely."

Of course, maybe it will just be a useless cargo stunt and/or they fail to walk on surface?

Does falling over on first step count as a 'walk'? Similarly walking in landed ship but failing to get down to surface?

This market should be lower than this one:

https://manifold.markets/jim/will-a-humanoid-robot-set-foot-on-m

This might give useful information