Some of your locations might have very simple requirements for a warehouse. The number of different items and the total quantity that needs to be processed is low; all products are stored in fixed bins or just one bin each; there are not many movements.
For cases like this, you might not want to work with mobile devices, but only print out a simple pick list. Maybe no waves are required and the small number of outbound deliveries per day is processed manually.
SAP S/4HANA offers an SAP Fiori app especially for this type of outbound process. It enables the user to execute the complete process from within this one app.
Note
Of course, a small warehouse can also require complex processes and the use of mobile devices, and the SAP Fiori app can also be used in more complex scenarios. Having a simple warehouse is not an exclusive criteria for using this SAP Fiori app.