Fortunately, there are freely available table of contents templates that can be used in Google Docs. Once you have opened the template you can begin customizing the template to suit your own needs.

The new templates might make it easier for users moving over from Microsoft’s office suite and Powerpoint, similar to recent updates that brought easier table formatting to Google Sheets and ...

When you create/select a table of contents, tap the overflow menu button next to refresh for “More options.” Google is also “reorganizing the options included in the table properties sidebar.” ...