Help! - exporting Nanite Megaplants Procedural Vegetation

Hi, yall, ive been stuck on this issue the whole day. i cant seem to export the whole tree i generated using PVE, with the leaves, into Blender.
Im working on a simulation, basically the whole gist is generating an infinite forest, and having the trees fade/morph into simpler more messed up version of themselves as the player speeds up. im doing this via material opacity mask, and material instances that override the static mesh in PCG graph (which has not been ideal, it messes up the textures, and the nanite foliage doesnt work at all with this pipeline) - so im trying to simplify the mesh to get it working within my pcg graph and also be able to edit it inside blender. any thoughts on why its always crashing when i try to export it?
thank yall so much!!!
picture of how my mesh looks in blender (no leaves)