Why does my Deutsche Post item stop tracking after it leaves Germany?

Once an item is exported, the destination country's postal operator handles the last mile, and its scans may not always flow back to the German system in real time. The same Sendungsnummer is recognised internationally under the UPU S10 standard, so you can usually paste it into the destination post's tracking page (for example USPS for the United States) to see the freshest updates.