Is Magento 2 menu not showing?

The issue when a navigation menu isn’t showing on the Magento 2 frontend even if you have set definite categories correctly is common for Magento 2.  Thus, you’d better learn how to deal with it even before creating a broad category system in your Magento 2. 

Why is Magento 2 menu not showing and how to fix it?

The issue occurs when you change the Root category: if you change the default category or create new Root category, the Navigation won’t recognize it without additional settings.

Step #1: add a Root Category

• Log in to the Admin Panel;
• Navigate to Product>Category and choose the ‘Add Root Category’ option:

• Give it a name and make sure the triggers above are switched to ‘Yes’.
• Click the ‘Save’ button.

Step #2: create a subcategory of the new Root Category

• choose the just-out category (we have named it: example) and choose the ‘Add Subcategory’ option:

• Make sure the name is given, the triggers are set to ‘Yes’ and the ‘Included on the Nav Menu’ is changed to ‘Yes’;
• Don’t forget to save the subcategory.

Step #3: choose the new Root Category

• Next, to fix that Magento 2 menu is not showing, return to the main sidebar, choose Stores>All Stores, select the Main Website Store option and look through the content:

• Choose the Root Category drop-down menu and click the category you’ve just created:

• Click the ‘Save Store’ button.

All the newly-created Magento 2 categories that was not showing will appear on the top navigation menu.

→ Create a custom menu with the Mega Menu extension

According to the statistics, you may find helpfull the following question about custom icon configuration.