Good Evening,
Excellent question. Sorry for the confusion over child menu groups. They actually aren’t taken into consideration in Bottega at all. That level of hierarchy isn’t there. The parent/child drop down is something that WordPress generates for taxonomies like our menu groups, but they aren’t set to display in that way.
If you need to have two separate menu groups on one page, here’s what I would suggest. Create a page for both of them. Then use the shortcode option to display each one. To display a list, use this shortcode:
[menu group="burgers"]
where burgers is the slug of the menu group. You can find the slug by going to food > menu groups in your admin. They will be listed there.
Each time a shortcode is used, it will display a list of your food items in that group. It won’t display anything else though so you’ll want to add in your own headers, description images and so on before and/or after each shortcode.
See if that doesn’t do the trick for you. Let me know if you run into any trouble.
Take care,
Bill