Hello, there is no standard format for point clouds, unfortunately.
So pipelines for loading point clouds to various packages are numerous, and it's difficult to support all of them.
OBJ file with multiple frames in single file is understood by 3ds Max. That's very unfortunate that it is not understood by Maya.
You can check this recommendation:
https://forums.autodesk.com/t5/maya-forum/point-cloud/td-p/6663116They mention .xyz format, that is supported by iPi Mocap Studio as well. It exports each frame to a single .xyz file.