I know that there are mega menu modules but that's not what I'm going for here. 

There's this code in the navbar:

 <t t-foreach="website.menu_id.child_id" t-as="submenu">
   <t t-call="website.submenu"/>
 </t> 

I think this prevents there being any sub-submenus. It's not recursive that I can tell. I've tried adding another foreach to get to sub-submenus but that didn't work either.

Ideally, I'd like to code the menuitems into my custom theme like I've done for the others. When I do it now, all it does is create a dropdown-toggle <a> but it doesn't actually drop down. Here's what I've got in my code:

Is there any way to achieve this?