Just to confirm the answers to your questions:
i. Yes, host uses the AMD fTPM
ii. Confirmed enabled
iii Confirmed (see image above)
iv. Yes, each bios update resets the TPM. So what I have to do on the host system is suspend bitlocker on the OS volume during the update otherwise the OS volume locks and requires a recovery code. I believe I fixed this behavior just now by changing a bios setting NOT to "reset TPM when new CPU installed". I think what was happening is when the BIOS was updated it thinks a new CPU is installed and clears the TPM. Because its an fTPM though this could be normal behavior when a BIOS update is installed...but I would think not.
v. honestly I don't recall enough to expand on this. I don't recall performing any special configuration ( I would remember that).
I think its safe to assume the fTPM was reset when the BIOS update was performed. Is there any way to recover these VMs at this point? Two of them are really important and I don't want to lose those.
