I too had this problem. The workaround is to find the <name of your vm>.vmx file and add the line:

firmware = "efi"

It won't show up in the advanced features, but the VM will boot as a UEFI system.

I've dug into everything I can, but I can't make it show (I'm on Fusion 12.1.2).

I did the mbr2gpt changes (per MS instructions) and then changed the .vmx file (__before__ encrypting).  It worked fine.

After encrypting, I was able to add the TPM capability.