If the end-goal is robot maid, aka cooks and cleans for a household, it at minimum needs to handle stairs and uneven ground like gardens.

Something to get the laundry from each room, wash, dry, fold, put away.

Cut and cook ingredients then do the dishes.

Mow the lawn, water the plants and do basic weeding etc.

Maybe even climb a ladder to empty the gutters / clean windows.

A non-humanoid will never be able to accomplish that without dedicated implements.