Only getting 32 bit options in Virtual Box

As far as I can tell my motherboard (Asrock N68C-GS4 FX) has no setting for AMD-V only "Secure Virtual Machine" and it is [ENABLED]
The processor is an AMD FX8320E. It says it has AMD-V. The Motherboard has the most recent version of the firmware.
I installed Virtual Box on a 64 bit Ubuntu 20.04 desktop but all I get are 32-bit options.
How can I enable 64bit options? I want to install 64bit Windows as a VM.