I could see more components being shipped first party if the community took over gpui, or for some crazy reason a team was funded to develop gpui full time, but developing baseline components is an immense amount of work, both to create an maintain.
Buttons (any div can be a button), clipboard, scroll views (div, list, uniform_list) should all already be in gpui.
All of those are handled. Run the "story" app. It is very impressive IMO.
Components list: https://longbridge.github.io/gpui-component/docs/components/