If you loved Made in Abyss: Dawn of the Deep Soul, try Made in Abyss: Journey's Dawn
A bridge between a film you've already seen and one most people haven't. Made in Abyss: Journey's Dawn has roughly 3.6× fewer votes than Made in Abyss: Dawn of the Deep Soul — it's a deeper cut, not a mainstream recommendation. Here's what they share, and what the second one does that the first one doesn't.

Made in Abyss: Dawn of the Deep Soul

Made in Abyss: Journey's Dawn
What they share
Both films are directed by Masayuki Kojima, and they both carry the dread, foreign gem mood tags, and they sit in Adventure / Animation / Fantasy / Mystery territory. If that's the register that drew you to Made in Abyss: Dawn of the Deep Soul, the second film will land in a comparable space — through a different lens.
What Made in Abyss: Journey's Dawn is
Deep within the Abyss a helmet falls, summer sunlight fading, a lone pickaxe strikes stone. Riko and Reg descend into darkness, seeking the White Whistle Ozen. Masayuki Kojima's direction brings this fantastical world to life.