Where are you located? I am in the US. I downloaded and logged into the App again (just in case something changed) and I see no option to add cheese to a hamburger happy meal. I can pick a hamburger meal and “customize”, and add everything else – even a second hamburger patty if I wanted – but no cheese.
Maybe it’s just with my local McD?
Massachusetts. Adding cheese is there for the two McD’s near me.
https://lemm.ee/pictrs/image/c7323c38-f5d0-47e0-b96d-9264755fb952.png
https://lemm.ee/pictrs/image/81a3ab83-85cd-4f5f-8332-3c997c43a5a2.png
Weird. I don’t see that “American Cheese” line at all. Maybe it’s a NY thing.
I see cheese in Buffalo and Rochester, but not in Albany. It’s more localized than NY.
Checking in from Iowa and I have the option here too when I hit the customize button. I do have to scroll down a bit?
You might try uninstalling and reinstalling. If on android, clear your settings before the uninstall. The mcdee app does tend to be kind of unpredictable.
If that doesn’t work, send an email to them. I actually did email on some problem I had and they responded pretty quick with a temp workaround and fixed it later.