Porsche is expanding production of the 718 model line to the multi-brand Volkswagen Group plant in Osnabrück to keep up with demand and likely prepare for the future.
Osnabrück is the same plant responsible for overflow production of the Cayenne. It will take time to prep Osnabrück for 718 production with cars set to roll off the line in the middle of 2023.
Porsche noted this expansion will not affect the number of employees currently working on 718 production at the car's current production facility in Zuffenhausen in Stuttgart.

Porsche adds second 718 production line
The new 718 production line in Osnabrück, Germany, will help Porsche meet demand for the more affordable of its two sports cars, and possibly build the current version along with the forthcoming electric version.
I am seeing other brands do this as well. Some are expanding their factories and others are planning out big factories for their vehicles. It seems like the push for EV vehicles is finally here and some are estimating by 2030, 85% of drivers will be driving fully electric or hybrid vehicles!