Unable to enable full disk encryption when installing ubuntu

I am trying to install ubuntu 20.04 with full disk encryption however it is not giving me the option to. I am referring to this guide full disk encryption with 20.04 which shows that there is an installation type menu. However, as seen above my ubuntu does not give me an options and directly installs the entire OS without giving me any options or windows.

I am installing this ubuntu as a virtual machine in VMWare.