Can I use the VSP Engine Tools for prints in ArcGIS Pro?

Yes, you can use the VSP Engine Tools if you have installed VertiGIS Studio Desktop (VSD).

VSD extends ArcGIS Pro and therefore also provides functionality to integrate the VSP Engine Tools. VSD already comes with build-in VSP Engine Tools. They are immediately available to perform advanced prints in ArcGIS Pro. You do NOT need to also install the VSP Engine Tools on an ArcGIS Server. However, it is possible to use the VSP Engine Tools published on an ArcGIS Server with VSD by configuring the service endpoint of the Engine Tools in VSD.

For more information see the documentation of VSD: https://docs.vertigisstudio.com/desktop