For now they are, and that might hold true in the future as well.
There are some projects to bring BPF features needed (generally called eBPF) to FreeBSD, such as https://github.com/YutaroHayakawa/generic-ebpf - but there's no accepted mainline implementation as of yet.
There are some projects to bring BPF features needed (generally called eBPF) to FreeBSD, such as https://github.com/YutaroHayakawa/generic-ebpf - but there's no accepted mainline implementation as of yet.