I am working on a lengthy document. How do I go to a page … – Google Help

Unfortunately, Docs doesn’t currently have a “Go to page number” feature at this time. There are a couple of alternatives you can use to accomplish something similar: 1. You can insert a bookmark at the point you want to go to in your document. How to Create a Bookmark in a Document

https://support.google.com/docs/thread/2257705/i-am-working-on-a-lengthy-document-how-do-i-go-to-a-page-in-the-doc-without-having-to-scroll-down?hl=en