Assign the correct item groups to the item group packages
There are three item group packages for the ProductionControlApp, which decide which items are shown or hidden on which tab.
Go to the Administration tab and click on Settings > Items > Item group packages.
Item group package ProductionControlApp: For all item groups that are subgroups of production items. Example: Meat production, fish production, side dish production
Artikelgruppenpaket ProduktionsApp_Filter: For all items groups whose items are to show in the ProductionControlApp. P.ex.: food and drinks, but not crockery or equipment
Artikelgruppenpaket ProduktionsApp_Zutaten: For all item groups that are to show on the Ingredients tab. P.ex.: Item groups of the top group "Purchase items" (dry goods, egg products, meat) or component items labelled as "Stock items" (Spice mix du chef)