You must use Google Docs built-in header styles for this to work ... This means you will structure the table of contents and then link the headings in your Google Doc document to the items yourself.

What is Google Sheet Linking? When you link Google Sheets with Google Docs, Google Slides, and Google Forms, you unlock a powerful synergy that enhances your productivity and streamlines your workflow ...

Google Docs that are publicly available have been used to train Google's AI. But just what is a "publicly available" Google Doc? Don't worry. Google says it won't be scraping your docs if they're set ...