Thanks @Mister_Nobody
Interesting, but not what I was looking for. The link references the hosts impact on the VM's.
I was looking for a field that reported back what generation the Hyper-V VM was created under, Gen 1 or Gen 2. I have some VM's that were created under Gen1, even though they could have been a Gen 2 model. Legacy builds that were in place before newer versions were available and can't readily be changed or redone.
I use this info if I have to restore the VM's from bare metal backups. Easy to wipe out the VM and environment and rebuild the Hyper-V bits, then bare metal restore. Faster than fixing a pooched environment in my cases.
Best I've come up with is a custom field called Hyper-V Gen. and use that in my reports.