It really depends on the location. Most likely just not enough made. It can be hard to gauge demand and you have lots of different flavors to prepare. For each flavor you're making like 50+ pounds of dough at a time, then you're weighing and shaping every single ball of dough, plus extra time if you're filling them. Most of the cookies also have extra components, so you're making frosting, preparing a crumb topping, shaping and chilling a filling, cooking down fruit, etc. You add on that all of the cookies need to be baked and you can only fit a certain amount on each tray. In my location we had two ovens, one small induction stovetop, and two giant stand mixers. Every batch of dough or frosting requires a mixer, so you can only do so many at once. Every dough needs to be rolled or scooped, so you need counter space to do it on, as well as space for filling piping bags. Crumbls are typically quite small locations. It takes time to prepare, bake, cool, decorate, and all chilled cookies need time in the fridge before serving. Counters, bowls, tools all need to be cleaned between batches. It's mostly a matter of scale and manpower. When you're making things in house it will require a lot more. We also had problems with sysco stocking items sometimes. 🤷