How to use microVM as a machine type?

Hi, Recently I'm hitting a bug related to edk2 that sometimes boot up can be very slow (before loading the bootloader): https://github.com/tianocore/edk2/issues/10765 It looks like the cause is the related to flash IOs. So I want to try using microVM machine type, as it's json file describes the device mapping is "memory", which should work around the slow boot. But I'm unable to setup a machine using microVM machine type in virtual-manager. And manually editing the xml file doesn't let me go any further, as VMM creates a default xml with ACPI feature, which is not supported by microVM. So I'm wondering, what's the proper way to use microVM machine type inside libvirt? Thanks, Qu