I understand that there are some providers like UPS in the USA that are blocking api access.
The app currently just takes us to the UPS website when we click the entry in the app.
I cannot find UPS on the phone app, and was only able to add it to the website. After syncing it then showed on the app. After it was on the app I could then find UPS on the dropdown for adding a new entry. However, I still cannot find UPS on the "add partial delivery" option and I assume that is due to the "open browser on click" feature not working with partial deliveries.