https://github.com/paigeadelethompson/PostmarketOS-Lomiri-Images/
Download zipfile from the releases section, extract
qemu-system-x86_64 \
-nodefaults \
-nographic \
-M q35 \
-m 8192M \
-smp 4 \
-kernel boot/vmlinuz-edge \
-initrd boot/initramfs \
-append "console=ttyS0,115200n8 console=tty0 root=/dev/vda2" \
-device virtio-blk-pci,drive=system \
-drive if=none,id=system,file=qemu-amd64.img,id=hd0,format=raw,cache=unsafe \
-device virtio-gpu-gl \
-display gtk,gl=on \
-device usb-ehci \
-device qemu-xhci \
-device usb-kbd \
-device usb-mouse \
-device usb-tablet \
-netdev user,id=net0,net=169.254.0.0/16,dhcpstart=169.254.0.2 \
-device virtio-net-pci,netdev=net0 \
-device ich9-intel-hda \
-device hda-micro \
-serial mon:stdio \
-enable-kvm
User: postmarketos
Password: postmarketos this also works for the security pin.