While I doubt anyone seriously expected anything different, Avengers: Endgame has officially been rated PG-13.
Marvel released a new “Stakes” featurette this morning, which you can see below, and the rating officially appears at the end:
PG-13: Sequences of Sci-Fi Violence and Action, and Some Language
Cap isn’t going to be happy with that “Some Language” reason.
Here’s the featurette: