It's also more than three hours long, so you're probably curious about the mid- or post-credits scenes thehas . No, Avatar: The Way of Water doesn't have an extra scene during or after the credits. We don't get any Easter eggs or a "Jake Sully will return" message either, it just cuts to the studio logo.
Cameron probably decided the ending left us with enough to chew on as we await Avatar 3, which is (with 4 and 5 to follow in 2026 and 2028).
The initial credits sequence includes beautiful interpretations of imagery from the movie though, so you might want to stick around for that. Otherwise, you can confidentlyand go to the bathroom or get some fresh air. The Way of Water will likely hit in a few months, so you can revisit Pandora then.