How to implement the two categories of the same content type to automatically generate a new aggregation page?
Create a new view, go to admin/structure/views/add

Show: Content of type: All

✅ Create a page

Display Format: Unformatted List of: Fields

Save and Edit

Now in your view, Click on Advanced (located in the right side). 

RELATIONSHIPS click add

Select ✅ Taxonomy terms on node 

For Vocabularies checkmark your vocabs and then checkmark ✅ require relationship.

Then in FILTER CRITERIA add Has taxonomy term 

✅ Autocomplete, then type regional, attribute.