Still bummed that Deliveries got discontinued. The FedEx app is truly awful. UPS is less worse but still pretty janky.
I do know there are alternatives (like https://parcelapp.net) and to be honest I haven't looked at any of them. I'm sure some are OK/usable, I'm just bummed because I hate change.
Parcel - Delivery Tracking for iPhone, iPad and Mac

The best delivery tracking app available for iOS and macOS.

‎Route: Package Tracker

‎Route is the premier package tracker for all of your online orders. Join over 50 Million people who have tracked their orders with Route. Route connects with millions of online stores and over 600 shipping carriers worldwide, including Amazon, FedEx, UPS, USPS, DHL, and more. Get shipping notificati…

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