OBJ materials not showing after export

I am trying to export a rhino model as an OBJ for powder print, when I open it on 3d viewer or meshlab to view only one material is showing.

View in rhino


what the obj should look like at the end:

View in 3d viewer

view in meshlab (only one texture shows)

link to rhino model (file is too big to upload): dome slice_20240711.3dm - Google Drive

thanks