Face the facts. There is no turf that is 100% shade tolerant, meaning turfgrass will not grow in a “dense”, “full” or “heavy” shaded area. It just does not exist. All plants need at least some sunlight in order to flourish. There are some “high speed” hybrids out there. Genetically engineered turfgrass. Yes; only in America. Like turfgrass made in a test tube or something.
Some “dense shade” seeds say on the bag that you have to have at least 3 hours of sunlight.