Twig template for content in body
The correct answer is you need to look at how to turn on twig debugging
Please read and understand:
https://www.drupal.org/docs/theming-drupal/twig-in-drupal/debugging-twig-templates
once you have fully read the above and have set it up you will be able to find the correct template and copy the default form  the core to your theme and edit away.