where did all the components go

[bryanhpchiang]

only button left in the UI folder

[multiwebinc]

You need to add the ones you want via npx shadcn-ui add, for example npx shadcn-ui add accordion to add that component or leave the component name blank to select from a list of components.

[merzainc]

only button left in the UI folder

This is just a template for you to get started quickly. It doesn't make sense to opinionate and provide all the components because not every project requires a dialog component
..e.tc and you can customize it to suit your own needs.
Use the strategy explained by @multiwebinc that's the proper way to go.