Well, there are a lot of drinks with ‘sparkler’ in the name.
And then there’s the ubiquitous American Flag Sheet Cake, made with blueberries and red berries - strawberry or raspberry; but here’s one that’s a little different:
https://www.landolakes.com/recipe/16620/american-flag-cake/
Hmmm - was also looking for those finger type apetizers eaten before the big meal - doing dogs, German sausage, BBQ wings; stuff like that.