Got it!
As I was not getting this stat after getting output of get-vm <vm-name> |get-stattype , I thought it doesn't exist from cli level. Should we always check from get-stattype about the stat available for the object ?
I was getting below stat listed for a VM
get-vm <name> |Get-StatType
cpu.usage.average
cpu.usagemhz.average
cpu.ready.summation
mem.usage.average
mem.swapinRate.average
mem.swapoutRate.average
mem.vmmemctl.average
mem.consumed.average
mem.overhead.average
disk.usage.average
disk.maxTotalLatency.latest
net.usage.average
sys.uptime.latest
cpu.cpuentitlement.latest
mem.mementitlement.latest
disk.used.latest
disk.provisioned.latest
disk.unshared.latest