I'm glad you're enjoying it! :)
A lot of the optional content is kinda hidden away on purpose; partially to reward exploration, partially for the nice surprise when you stumble on something new, partially because I'm old-school and hate hand-holding in games (Yes, Atreus, I KNOW I have to pull the lever!) and partially to encourage players to get together and pool their knowledge.
There is a player-run wiki (click on the Fandom icon on the game's main screen! Or just click here: https://corrupted-kingdoms.fandom.com/wiki/Corrupted_Kingdoms_Wiki ) but it's not really updated :P
I hope you continue to enjoy everything I have planned for the future of CK!