The Site Audit module is a classic. It will reach 10 years old in June of 2023. It gives you a detailed report of your Drupal site in the web admin, providing a nice pass-fail display for review. It has a drush command that renders the report to the terminal in HTML, text, or JSON.
Earlier this year, we started a new project that resulted in a few new features for Site Module, launching the 4.x version branch.