Have you explored Creo surface selection improvements in assembly?

Creo Parametric 12.4.0.0
User Interface Location: Surface Sets dialog box.

Description
Surface selection across multiple parts during surface set definition has been enhanced. The selection filter now includes a Part option that enables multi-part selection. When parts are selected, they are automatically interpreted using the Surfaces of all bodies rule.

You can select surfaces directly from the Model Tree or the graphics window. When the selection filter is explicitly set to Part, box selection becomes available, allowing you to select multiple parts at once.

In the figure below, multiple parts are selected.

Benefits
This enhancement makes multi-part surface selection easier and more efficient in the Assembly environment.

Additional Information

For more information, Follow this link.

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