To my knowledge vSphere replication is only on a per-VM basis and there is no way to create a consistency group as such.
The closest reference I could seem to find was in the following post, though is a few years old (Couldn't find it in the updated Storagehub article) - vSphere Replication Frequently Asked Questions (FAQ) - The current version of this doc has moved to: https://storagehub.vmware.com/#!/vsphere-replication/vsphere-replication-faq
Are consistency groups supported by vSphere Replication?
There is no way to ensure consistency across multiple VMs with vSphere Replication. Many applications are ok with inconsistent recovery – for example, if an application server is recovered to a point in time 30 minutes later than a database server it is dependent on. However, some applications do require consistency. For those applications, array replication is recommended.
Still, you can replicate as many VMs with one vSphere Replication appliance as you'd like.
There are settings for every such replication to create point-in-time snapshots too.