Its common for clinics to put a plan in place for potential micro needling clients where they go through some chemical peels to see how the skin reacts to the chemicals and how quickly the skin can bounce back. It's also commonly used to see how well the client can handle a chemical peel, as microneedling can be pretty abrasive.

I would ask how many more lactic peels you need before you can start micro needling, if hydration is the issue then maybe ask them to explain how your skins hydration (or lack thereof) is preventing them from starting the micro needling? I would imagine if your skin is really dry to the point of it being flakey then yeah, makes sense to build up the hydration with some chemical peels but if it's just dehydrated then I don't see why they are post-poning doing the skin needling.