Run pnpm i to install the dependencies for all Node.js templates. You can then run each project individually with pnpm dev.
For Deno templates, they are installed on-the-fly when the deno task dev command is run. Check their project READMEs for more information.
Run pnpm update-deps. You may also need to update @vitejs/plugin-react-swc in index.js, and npm:@deno/vite-plugin in deno.jsons manually.