@SKT PORO
You would have to exchange the default vertexes with the blend vertexes of the vanishing morph. I've got custom software that does it for me, not for sale. Too tedious to do it manually. I guess you could also scale all of the vertexes by 0% on X, Y, and Z; but that would also be rather tedious to do manually.
You might be able to set duration to 99999 ... and set the appear animation to inft loop the appear morph 0 times with replace, but I imagine that would cause flickering on mobile, which does not process as quickly as PC.