No, we wouldn't recommend for use on alcantara. Suede and alcantara are tricky materials, you will need a specialized cleaner and brush for those types of materials.
It may work, but we wouldn't really recommend it as we haven't done enough testing on these types of materials. They are very tricky and sometimes damage can occur if improperly handled. Your best bet would be to ask the car dealer what types of products they recommend for cleaning it
They would know exactly what to do.