Import PDFs into the working page
In Inkscape 1.3, the option to import a PDF into the current page seems to have been lost and each PDF is loaded into it's own separate page in the workspace (see below):
When there is only 1 page of the PDF, the "Pages" field says "all" but it is greyed out and you can't insert any values (see below):
but even when there are multiple pages and the user can input a page range, each page is loaded into a new "page" in the Inkscape workspace, as seen above.
In Inkscape 1.2.x, when importing the PDF you could uncheck the "All" box and then the PDF is loaded without it's own page:
