Do you have VMs with just one cpu assigned or multiple CPU's for which the VM's has no co-stop?
I didnt understand your question. one vm is working esxi host and vm has 34 vcpu. I saw co-stop on vrealize. also there are another vm's on that esxi host
do the VMs which doesn't show co-stop value has more than one CPU?
The co-stop value will be shown only with VMs which have multiple vCPUs.
Please refer this KB and following article.