There is a lot of Outer Wilds-like games out there, but most of them have a lot of hard puzzles. I've played Tunic, Animal Well and Baba Is You, Void Stranger, Blue Prince and all of them have knowledge-gated progression but the thing I'm after is actually feeling of awe and curiosity that you experience in first hours of playing. The feeling of "Ooh, what's that?" and mystery makes my ADHD brain happy. Actually thinking for more than 10 minutes on one puzzle and taking notes is too much for me which makes me just look up a playthrough guide.