I got two FreeBSD VMs working with my setup of Linux VMs separated by each service, all the Linux VMs report the RAM usage correctly but for some reason the FreeBSD ones always report as 0MiB:

Of course this is wrong, in the FreeBSD VM, running htop will show the usage fine.

Does FreeBSD do something to break that functionality? Googling does show existing issues (somewhat) related to virtio_balloon but both did were not useful for my issue. (1, 2)