Use Publisher To Remove Pages From. But no there is no built in method in Publisher to extract a single page from an existing publication. You could also simply do a Save As a copy of your publication and delete all the pages that you dont want to keep.
Delete a page In your open publication turn to the page you want to delete. In the Page Navigation pane right-click the page you want to delete and then click Delete. Its something Ive left feedback to the Pages team about.
Then in your copy create a macro with a name like deletepages.
Upload your file and transform it. This guide will show you how to use Microsoft Publisher to help create a wide variety of desktop publishing projects. Sub deletepages Dim firstpage lastpage As Long. Click the Delete button in the Pages button group on the Page Design tab within the Ribbon.