Can 'Vegetation Paint' be used on Megascans objects, as in rock formations?

Allow me to clarify….the vegetation used in the tutorial is from the Twinmotion library, as Megascans vegetation cannot be used with the Vegetation Paint Tool. However, in the tutorial the TM vegetation is painted onto rocks dragged into the scene directly from the Megascans library that’s built into TM. Here’s the tutorial if you’re interested:

https://m.youtube.com/watch?v=a_a8gbKP4Vk&t=733s&pp=ygUjVHd1bm1vdGlvbiAyMDIzIHJlYWxpc3RpYyBsYW5kc2NhcGU%3D