Displaying the Recipe Collections feature
Go to Pages > Add New to create a regular page that you can add the feature to.
Adding Recipe Collections in the Gutenberg Block Editor
Click on the + icon and select the Recipe Collections block:
That's it! The Recipe Collections feature will get displayed in the same location as that block.
Adding the shortcode in the Classic Editor
In the classic editor you type in the [wprm-recipe-collections] shortcode where you want the feature to appear: