Just fair warning, it's an episode of Strange New Worlds that the crossover happens, not Lower Decks. It's actually in live action, and Mariner and Boimler's VAs play the live-action versions of them too. It even ends with a scene where the Strange New Worlds cast is animated like in Lower Decks:
https://www.youtube.com/watch?v=HHQYsbvWfXU
For sure.
It's a pretty fun dynamic so far.