Does anyone know the name of this recurring musical theme?

I'm rewatching the show, and there's one recurring musical motif that I absolutely love. It's very solemn and epic, with what sounds like an orchestra, and it plays during several important emotional moments throughout the series.

One example is in Book 2, Episode 19 ("The Guru"), around 3:10, when Sokka reunites with Hakoda and they hug. That's one of the moments where it plays.

I've listened to the official soundtrack, but I can't figure out whether this motif has an official name or if it's just an unreleased cue that's reused throughout the show.

Does anyone know what it's called, or if there's a clean version of it somewhere?

Thanks in advance to anyone who can help!