What's the blocks you can put in the Overworld?

ItsDane

I found a list in CC Comunity Discord, but I do not know if it's complete, because of updates.

Lychee the Fruit

That's the only list available, I only think that the blocks made from fish junk was added
https://forums2.cubiccastles.com/index.php?p=/discussion/29788/all-the-blocks-that-are-allowed-in-the-new-overworlds-update#latest