I was sad OpenBSD wouldn't work on the original Raspberry Pi Zero since it was based on the original Pi 1 and we no longer have an armv6 port, but the Pi Zero 2 is based on the Pi 3 which is supported by OpenBSD/arm64 so hopefully it will work on this. I have one pre-ordered...
https://twitter.com/Raspberry_Pi/status/1453602899737591812