Is it necessary to make reservations for breakfast at - for example - Garden Grove?
It’s not showing up right now on MDE as reservable for breakfast tomorrow.
I’d bet you could walk up and have breakfast there today.
When it used to be character dining you would make a reservation. But I think you’re ok without one now. You could call 407-934-1362 to be on the safe side.
I remember maybe seeing a post over on WDW Lines chat. You could do a quick check and ask over there- just scroll down to WDW Planning Tools-
http://m.touringplans.com/