If there are multiple files inside a project, then I need a way to publish link for each file. This way if I’m testing 2 design options related to same project, then I can have these 2 designs as 2 files and have unique link for each of the designs.
The v0 project is deployed as a single website, however you have full control over any subpaths you include
For example you could ask v0 to create a /demo directory with routes for different design mockups, even a sidebar that lists them all for easy navigation. For inspiration, I have an example similar to that here