Firstly, the manual for your board shows nothing... which is normal as its normally only the X boards that actually show all the features of the bios
shows a little more but its still not overly useful
There is a saying in security that it is difficult to secure a system if the attacker is able to tinker with hardware itself. On the server side, most of those issues have been put away by locking down said hardware in reasonably secured locations. But on the client side, those solutions are not...
shame AMD CBS only shows in some makers boards.
Its possible that option was added to a later bios to what manual is for
X570 new bios
Its possible you don't get the feature since it shows on the OC Menu. I don't know if your bios shows that as manual only shows how to update your bios, not what any of the screens look like