Unfortunately, this feature isn’t available for Google Docs on Android. If you want to insert a table of contents in your document, you’ll need to use the desktop or iOS versions.

You can create a table of contents in a Google Doc with a computer, iPhone, or iPad. Google Docs' table of contents feature gives readers an organized outline of the entire document.

Google Docs is more powerful than it appears. You can create long-form projects on Google Docs as well as a table of contents.

Meanwhile, Google Docs is also adding table templates to “quickly insert building blocks for common workflows” like a Launch content tracker, Project asset, Review tracker, and Product roadmap.

It might not make a lot of sense if you’re using Docs for document editing. but if you use it for any kind of tabular or project management work, drop-downs can be a great way to update a table.