Are you saying that page numbers are missing in section 2 or that their numbering is incorrect?

If you are trying to add numbers, just double-click to activate the header of section 2 and then insert a page number field (at the insertion point) by pressing Alt+Shift+P.

To change restart options for page numbers, click in the section where the page number is incorrect and then click Insert tab | Page Number | Format Page Numbers. For example, if you want the numbering to continue from the previous section, choose that option and then click OK.

__________________
Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional