Anybody have tested msm4 message?

Does test msm4 message? As I looked, PX4 support msm4 message for RTK GPS. But, it looks like not working. My RTK module(XL RTK used M8P) fixed when come msm7 message(1077 or 1087). But msm4 come RTK, it doesn’t react.
I wonder it is worked.
Or can I simulate?

https://github.com/PX4/GpsDrivers/commit/657514b26a0bf1b1ea2bf723b18449b04248822c#diff-ac1f908f3e6dae4611d3ff3fb715a0fa