This article explains how to correct page numbers in Word 2021, 2019, 2016, and Word for Microsoft 365.
How to Insert a Page Number in Word from a Specific Page
If your page numbering in Word is incorrect, the easiest solution is to remove the page numbers and start over. To remove page numbers in Word, click anywhere in your document, go to the Insert tab, and select Page Number > Remove Page Numbers. You can then adjust the numbering settings and add page numbers to your Word document.
To adjust the numbering settings, go to the Insert tab and select Page Number > Format Page Numbers.
You can choose a numbering format here and even include chapter information. Under Page Numbering, make sure Start at is set to 1. Select OK to save the changes.