Yes, you are right on that. This is what the Release notes for VCF 4.0 says on vRS deployment:

vRealize Suite 8.1 support: Cloud Foundation automates the deployment of vRealize Suite Lifecycle Manager 8.1. Follow the VMware Validated Design guidance to use vRealize Suite Lifecycle Manager to deploy vRealize Automation 8.1, vRealize Operations Manager 8.1, and vRealize Log Insight 8.1.

Hope that makes it clear.