Certain apps are designed exclusively for iPads due to the larger screen size and different functionalities. These "iPad only" apps are not available for iPhones, including the iPhone 16 Pro. If your work app is one of these, you'll likely not be able to download it directly onto your iPhone. You might want to check with the app developer if there's an iPhone version available or if there's a workaround. Alternatively, you could look for similar apps that are compatible with your iPhone.