Documentation from API definition

Hi all,
I started an API project writing OpenAPI code on the Postman Desktop app.
Despite the absence of synthax errors I do not see the live preview in the right pane (I have no ‘documentation’ icon on right sidebar).
If I press the ‘Definition’ row in the left pane I don’t have output on the central pane.

Anyway: if I wanted to give the API documentation to my collegue, how can I do it?
Is it possible without the access to Postman app/site? Such as, for example, the web page / link created for Collections ??

Thanks, regards