Posts Widget Navigation

I have a page with an Elementor (2.07) Posts widget set to display 3 columns and 6 posts per page. The Query settings are set to just show one category of posts: News. This properly displays the most recent 6 “News” posts, but there is no “previous” and “next” page navigation to view earlier posts. Dropping the Posts Navigation widget on the page does nothing useful – seems to be designed only for the theme builder stuff. How does one have an archive page for a particular post category with next and previous buttons to walk through all of the posts in that category?