It is possible to display a menu location using the [maxmegamenu] shortcode. This allows easy insertion of menus into your posts and pages.
Step 1: Registering a new menu location
First we’ll need to create a new menu location specifically for use with the shortcode.
Under Mega Menu > Menu Locations, click “Add another menu location”:

On the next page, provide a name for the new location. You can also assign an existing menu to the location here, or choose “Skip – I’ll assign a menu later”. Click ‘Add menu location’.

After creating the location you’ll be taken back to the main Menu Locations page. Click the new location to open its settings and go to the Display Options tab. You’ll find the shortcode here.

We now have a shortcode that can be pasted into posts and pages to display our new menu location.
Step 2: Display the menu in a post or page
To display the menu simply paste the shortcode from Step 1 into any post or page. In the block editor, use a Shortcode block.

End Result

Like any other Max Mega Menu enabled menu, you are free to restyle the menu using the Theme Editor and use all of the usual mega menu options to customize the menu.
You can repeat the same steps to create and display multiple Mega Menus on your site.