The first image is of the Game Namespace Level, while the second one is on the Studio Gamespace Level. Studio Gamespace seems to not have the namespace dropdown appearing.
Could you please try to go to namespaces page by manually going to /admin/namespaces and pick any namespace from it? Would like to see whether the namespace dropdown in the sidebar appears or not.
I’m currently speaking with the web team to see if this is a bug in our end.