During the stock booking in process in Stock In screen in Linnworks Mobile, it is possible to print stock item labels. 

Stock item label template can be modified in Linnworks template designer and the mobile application allows you to select a specific template. 

In Stock In screen, during the Quantity entry, you can tick Print Stock Item Label 

Once the stock is booked in a new screen will pop in letting you chose a template, the number of labels you want to print, and select a virtual printer where the labels will be printed.