Gnome on Xorg missing in login screen

I have chosen gnome in opensuse installation but when on the login screen, there’s no gear on the bottom right of the screen (I see a people/group icon) with to way to choose Gnome on Xorg.
I remember having this on Fedora and some people on this forum posted they chose Gnome on Xorg; so I am confused.
Is there a way to activate it or do I need to install it?

You have to type your username in first… then it will appear.