Native Unreal plugin AnimToTexture now supports Nanite. It’s a VAT feature they used for crowds in CitySample. I remade a editor blutility so ppl can bake VAT themselves with few clicks, but Nanite support wasn’t there. After almost a year, yesterday, I suddenly saw a small checkbox that triggered me to check if it works now… And that’s it. No need to spend enormous money on marketplace. So, check my quick video 
https://dev.epicgames.com/community/learning/tutorials/Y4Ox/unreal-engine-vat-with-nanite-now-in-unreal-5-4