Here's an interesting one. It got delivered today. Don't know if that's an issue. What makes it so interesting is that there is tracking data up to and including June 30th. I know I've another that's the same. I'll try to get it too. This is a USPS 1st class parcel.
*removed*
This one shows nothing in the app but when I ask to view in browser the USPS tracking is correct. Again a non priority package.
*removed*
Lastly is an Amazon package. UPS innovations I think its called where UPS is used to move the package to the delivery area then USPS actually delivers. I don't think giving you my Amazon order is helpful. If it is just let me know and I'll give it.
In summary, USPS tracking of 1st class parcel and non priority mail parcels seems to have stopped as of July 1. The last day with tracking data is June 30th.