 If you liked Yakusoku no Neverland |  ...then you might like Kanata no Astra |
The shows take place in the future and the histories of the worlds the main characters live in are filled with mysteries. The stories focus on teenagers/kids who find themselves in a dangerous situation and have to work together to get out of it alive. The main protagonists of both series are determined not to leave anyone of their team/family behind.
report Recommended by MidnightRainbow
Adventure kinda feel, plot twists, hidden truths, teamwork. Ended up rewatching both series too.
Both shows are about dystopian-type worlds that are hiding dark secrets just beneath the surface...
report Recommended by hatfielddr
If you're looking for something that will catch you off guard, then Astra Lost in Space will definitely blow your mind, just as The Promised Neverland left you with your jaw on the floor. However, rather than using horror, it uses a historical and perspective plot point to flip the script on you, all while you are completely engaged in the story progression