Let me begin with providing some information about how RPO is handled
and about a replicated VM that is shutdown or crashed --> vSphere Replication Frequently Asked Questions (FAQ) - The current version of this doc has moved to: https://storagehub.vmware.com/#!/vsphere-replication/vsphere-replication-faq
Refer these questions:
Where is VMware vSphere Replication information for the source virtual machine stored?
Can powered-off virtual machines be replicated using VMware vSphere Replication?
I hope that should answer your concern