Lars Ulrich is famous for not doing anything outside Metallica, which makes anything he has recorded outside of it a rarity.
He has only made 2 recordings outside Metallica, and in my opinion, the second one is by far the most interesting one:
1. “Return of the Vampire” by Mercyful Fate (1993)
2. "Triple Frontier” Movie soundtrack - Helicopter Scene (2019)
And so, one of the most thunderous drummers got himself into Metallica’s HQ to record. Here’s a good taste of that soundtrack: