Any application you build with Mendix, is readable in a browser and thus a website. If you want to build a website that consists of only static pages, just don’t create any entities, but only pages having static text-elements and images.
If you really looking for an explannation then Mendix web apps IS NOT EQUAL TO Modern SPA’s which hydrate on the client.
You can think of it as a fully rendered website delivered from an Application Server.
I dont think any Academy courses are there on this topic though (making static pages)