UE 4.27 skeletal mesh with morph targets

Hello friends,
i want to know in the skeletal mesh set morph targets method, if i can get the blend mesh data which contains the morph vertex position? And the other question is, the morph only working with the rendering settings “morph use gpu”, if i cancel the gpu optitions or in the c++ set the skeletalMeshComponent SetCPUSkinningEnabled to true, the morph will no function. Dose anyone know how to use the cpu to morph skeletal mesh, or how can i get the gpu morph blend result skeletal mesh vertex position values?