Call the bookmark toc and click Add. This creates a bookmark before the title, named in such a way that KDP's automatic conversion tools will recognize it as the start of your Table of Contents.

You can add a table of contents in Word to make your document look more professional and well-developed.

Inserting a table of contents in Microsoft Word provides an overview of the content. Here’s a guide on how to create a table of contents in Microsoft Word.

In MS Word, I have a table of contents that automatically adjusts page numbers etc. The way it is set up for example is to have the Chapter heading left justified with the page number right justified.