Microvias

I heard that one can create the stacked/staggered microvias in the layers 1-2 & 2-3 and skip microvia in the layer 1-3 of 6 layer stack up, when the prepreg is between layers 1 & 2 and the other prepreg is between the layers 2 & 3.

I want to know whether there is a possibility to create the same, when the prepreg (laser) is between layers 1-2 and the core is between layers 2-3, even when the PCB manufacturing company can make it.

Thanks in advance.

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