@aburka there is one for amd64 USB sticks. https://nycdn.netbsd.org/pub/NetBSD-daily/netbsd-11/20261014183245Z/images/NetBSD-11.0_STABLE-amd64-live.img.gz

note that the installer image is an installation of netbsd so it's perfectly acceptable to use it for testing hardware. it has an option to drop into a shell.