Strapi menus: relational type giving back 405 error

Of course, after making such a topic, a wild idea enters the mind:

I don’t need the plug-in for this, I can use Strapi’s components and single types to build my own nested menu. I only need 1 level of nesting, which keeps things simple.

Maybe this helps someone looking for an answer:

I created a MenuItem component and a SubMenuItem component. Then, I created a single type “Main menu”, which holds the repeatable component of MenuItem:

The UI might not be as fancy as with the Menus plugin, but it does the job