Hi
The following steps may help:
If you have not yet done so, update your iPhone and Apple Watch to the latest software, starting with your iPhone:
If you have not yet done so, update the Starbucks app to the latest version.
Keep in mind that not all third-party apps that offer complications for Apple Watch necessarily support complications in all sizes or for all possible locations on customisable watch faces.
- Some apps, for example, may only support larger complication sizes, such as the central position on the Modular watch face.
Otherwise, for assistance with issues concerning the features and performance of the Starbucks app on your Apple Watch and iPhone, I suggest that you consult the developer's support resources and/or contact the developer:
App details:
Support resources: