We’ve found that the ability to cut MDF/HDF varies by supplier. The stuff from the local Home Depot wouldn’t cut even with 10+ passes. Guessing it’s the binder used by the manufacturer. Stuff from our local hardwood/plywood supplier cuts wonderfully. I’d recommend sourcing a few samples and trying them out. A supplier that specializes in woods could also probably give you more info about what’s going into the material. Here’s a quick primer on glues which make a big difference when laser cutting plywoods/fiberboards.