Trying to get my head around different ways of using Razor Pages

Correct me if Im wrong, but since Razor Pages and their handler methods generally return a viewmodel, the whole page needs to refresh to handle this.  So there are different ways of setting up a razor page, much like there are with a MVC application.  Some of them are

- Handler methods.  Each method returns a model
- Named handler methods.  Each handler method is referenced via seperate form tag from within the razor page
- Partial pages
- Partial pages with Ajax, which lets you update sections of a page without refreshing the whole page
- Using a separate web api combined with jQuery to fetch data and update sections of a page. 

That about sum it up?  Please correct where Im wrong.