Very inspired by awesome Scalar sandbox, I created one for VitePress OpenAPI. Check it out:

vitepress-openapi.vercel.app/sandbox/

Now it dynamically generates the Sidebar items and displays either the 'One Operation' or 'All Operations' layout (the UI still has a lot of room for improvement)

Working on a Sandbox to easily visualize your OpenAPI integrated into VitePress docs! Check it out:

vitepress-openapi.vercel.app/sandbox/

Let me know what you think!