Posting external content as Posts or Pages is possible using the Import functionality under the ‘Settings > WP Web Scraper’ screen. However, it should be noted that this is not what WP Web Scraper is designed for. WP Web Scraper is more of a real time external content embedding solution.
You may want to explore some advanced plugins like WP All Import that are meant for this sort of stuff. Get in touch with us if you are looking at importing external content (XML, CSV, HTML etc) as posts or pages.