Is it possible to register a menu inside of a theme functions file and have 'Automatically add new top-level pages to this menu' pre-selected? I can't find any info about this in the register_nav_menus documentation.
2Possible duplicate of "Automatically add new top-level pages" Default– JHoffmannJan 31, 2017 at 10:13
Did you get the answer?– tru.dNov 18, 2019 at 6:58
That function just registers new menus.
If you want to create a custom type of menu, you need to create your own extended menu walker that would do something custom or activate any other functionality.
If you would like to have the top pages listed (in a menu or other situation), you can use wp_list_pages and limit to first level (or how many you need).
2This answer is pretty broad. Some example code would be helpful.– MylesApr 25, 2018 at 16:34