Booting TW micro with a serial console only such as:

virt-install --connect=qemu:///system 
-n microtest.suse.firstyear.id.au 
--import --boot uefi --osinfo opensusetumbleweed 
--virt-type kvm --hvm --machine q35 --cpu host-passthrough 
--graphics none --serial pty --console pty,target_type=virtio 
--autoconsole text --network=bridge=net_20,model=virtio 
--rng /dev/urandom 
--tpm backend.type=emulator,backend.version=2.0,model=tpm-tis 
--vcpu 2 --memory 2048 --security type=dynamic 
--disk
path=/mnt/libvirt/nvme/microtest.suse.firstyear.id.au.qcow2,bus=virtio,cache=none,sparse=no


No output will be displayed on the serial console during init (but grub and tty
will display)

The kernel cmdline should be adjusted to show output on both consoles.