Where is the UI Composer?

Perhaps I’m crazy, but I thought I remembered a UI composer for Ionic/Stencil, where I could drag and drop the components together, edit their attributes, and prototype a UI really quick.

Currently things like Figma, XD, Sketch, Framer are all just image tools, rather than anything replicating a UX. Nothing like what Adobe/Macromedia Fireworks use to be 20 years ago.

Really hoping for something where I can just drag and drop the components from UI Components | User Interface Application Building Components in place, then edit their attributes, to get a mockup going really quick. Rather than having to draw or copy vectors/bitmaps forever.

From some searching, after something like this: Demo — Blocks UI