If we run FreeBSD as guest of KVM host and installed qemu-guest-agent, it doesnt report correct memory usage of the guest VM. CPU usage work fine though. Using KVM in CentOS 8 Stream with oVirt.
Can you share some more information specially the delta in between the actual memory and the one it shows?
memory usage doesnt showing up at all. for example at ovirt (on my case), it showing unconfigured for guest memory usage.