Megaplants to PCG?

hi. beginner’s question:
do Megaplants work with PCG, and if so, can they work efficiently in large number?
I downloaded Baltic Pine from Fab and it comes as Skeletal Mesh type. I thought I’d be able to double click > Make Static Mesh, and then just use it in PCG Static Mesh Spawner, but the automatic conversion looks far from okay (left on attachment) and I don’t see any options to tweak it. I also tried export to FBX without success.
what’s the proper workflow?

I’d appreciate any tips, thanks.