pcb – When Altium exports a 3D step file, how do I control whether it has separate bodies for each component or not?

I try to share the exporting step file from Altium with our mechanical department (they’ve already used the NX Siemens CAD tool).

When exporting a 3D file from Altium and opening it into NX program, each component creates a 3D step file because of its footprint. Actually, we expect them to create a single body (for only PCB). Which export method can we use for that and how should we adjust the export method for this output?

I used the export feature of the step file in Altium more than one time. But once we open it in the MCAD program, It creates a separate body for each component. How do we fix that?