There is no relationship mapped between these two in schema. Hence this relationship is not visible in snow. Please share about type of blueprint used for deployment.
Standard IaaS blueprints - multiple vSphere VMs is a simple answer to this....however it can get more complex with Software Components on the vSphere VMs, NSX integration w/ On-demand Load Balancers or NSX tags/security groups
Yes, for multi machine blueprints, it is always good to have such relationship, but our present CMDB mapping is in primary stage. Primary intention was to provide day-2 operations for deployment and VMs, tracks them as CI in ServiceNow. Presently there is no relation maintained between deployment and VM.