My Premium Plugin or Theme isn't updating automatically
If you can already point to your plugins, themes and WordPress core upgrading automatically, then you know your automatic updates system is working.
But, if you have a premium/pro plugin/theme that isn't automatically updating, you will need to reach out to the developer of the plugin and ask them to ensure that it has been tested to work with automatic updates.
WordPress.org plugins/themes will have no problem updating, but premium plugins often have special update code which might not be applied during the WordPress automatic update process.
Check with the developer and ask that they've tested it.