Not surprising at all. First off you need screens, molds, and other one-per-machine equipment that has to be fully custom to whatever product you want to build.

Not surprising at all. First off you need screens, molds, and other one-per-machine equipment that has to be fully custom to whatever product you want to build. When expedited, these things can still take a week or more to create. From there you need to assemble a pipeline and do an enormous amount of tuning. Your first runs are generally going to completely unusable products because of a large number of mistakes in the manufacturing process. It takes time (also generally weeks) to find all the places where errors are happening and make the appropriate adjustments. When you are making 10,000 (or more) of something per day, no product is "simple".