Is there a menu bar widget in Qt Design Studio?

Question

I just installed Qt Creator and Qt Design Studio today and I can't, for the life of me, find a widget for a menu bar in Qt Design Studio.

I've used Qt before and I know there's a menu bar widget in Qt. The vast majority of search results are about Qt Creator, and the ones referring to Design Studio aren't helpful either.

Is this just an artifact of many "modern" applications being streamlined and not having menu bars, or am I missing something here?

Any help is appreciated, thanks!