How do I import a realistic tree?

So I recently tried making a realistic tree in blender and when importing it to roblox the meshes don’t appear to work.
Does anyone know how I can fix this, or a alternate way that I can make realistic trees in blender and import them to roblox studio
I believe it has something to do with the leaves, I’ve already reduced how many leave meshes are in the tree but it still doesn’t work.


try this

I think it’s 3600 parts, if you exceed it on one single blender mesh then it’s gonna reject it

Before it said that it exceeds 300 meshes so it couldn’t accept it, so I lowered it so about 100 meshes and it now says that.