Inkscape Wiki. Multipage

Multi-page feature was added in Inkscape 1.2. Its front end was implemented as a new Pages Tool in the toolbar.

Multi-page documents can be imported with their pages appended as new pages in the existing document. Select the correct option in the window that pops up to append pages rather than import shapes as usual. This can be used to merge multiple PDF files.

Saving a multi-page document to a format capable of storing multiple pages (e.g., PDF) will automatically save all pages. Exporting individual pages can be done in the new export dialog in batch mode. It is also possible to export each individual page in the Single export tab. Use this to split SVG or PDF documents into individual pages. Note: it’s not yet possible to select a sub-selection of multiple pages to export.