Can it support export the shape keys from the third party mods?

[NaughtDZ]

For ex：An uncensored body model called “SAC",Usually, it has a “vaginal_kupa” shape key.But when I exprot the character which use it. In blender ,even I chose skipp modifie shape key,It still missing. How do i keep it? PS: I try use MMD tool inport pmx file directly,shape key still missing.So,must something need to do when export pmx in game.

[NaughtDZ]

But,I try Grey's mesh exporter for Koikatsu.It can keep all the shape keys...but we all know GME out put fbx is suck. So , can KKBP keep all shape keys even from mod?