get https://api.similarweb.com/v2/website/{domain.com}/mobile-web/pages-per-visit
Returns the average pageviews per visit for a given domain, on mobile web.
Price: 1 hit per request
Historical data goes back 37 months, depending on your subscription.
To retrieve 'Last 28 days' remove the start_date & end_date parameters from the URL and set granularity to daily or weekly.