>I don’t see my new custom group in any drop So the breakfast item has the egg AND every other regular item.

yes it does.
you misunderstand how this works.
– you assign ingredients to (menu)sizes
– you assign menu items to (menu)sizes
– all ingredients assigned to a (menu)size will be available to all menu items assigned to the same (menu)size

you have more granular control to put a selection of those ingredients that belong to a (menu)size into specific groups with limits etc. via custom groups
you *could* add another custom group with group type “exclude” to additionally exclude the things you don’t want from a certain item

I would however suggest you organise your items(products) as to who they belong together

i.e
– create (menu)size(s) for your pizzas (as example)
– create (menu)size(s) for your pasta (as example)
– create (menu)size(s) for your burgers(as example)
— etc etc

now add all ingredients you might want to offer for pizzas to the “pizza” menu sizes
same for pasta, same for burgers

now you have all the appropriate toppings for the appropriate type of food – without “cross contamination” so to speak.

you can still exclude things if you like per item with additional groups, but as a basis the above kind of setup will most likely save you serious headaches in the future if you want to expand on things…..