Working with a list with over 11k items configured in qListView, Since the Default view of the WebPart is set to 50 items per page, when we export to Excel, it only exports the items from the currently loaded page (not from the entire list).

Also, the exporting process takes approx 1.5 minutes. However, when exporting directly from SharePoint list, entire list (11K records) takes approx 20 seconds.