Blendshape Import problem, split mesh

I made a mesh in blender that has a high poly count so unity splits it into two parts. This causes a problem because now the blendshapes don’t import anymore. If the mesh has a lower poly count and is not split the blendshapes import just fine. How can I fix this?

I need the blendshapes to do lip syncing.

Split it in blender, mesh should have less than 65k vert

That’s going to mess up my animations if I split it in Blender

Use mark sharp

Your suggestion makes no sense

mark sharp duplicate the vertex which allow you to have region, by delimiting rehion with less than 65k you can control how you import submesh and then align the normal in engine.

Or just decimate

Or maybe it’s just too much for you and should change the model entirely.