I see that the fertility rate is t only deteriorating in Germany. In fact it's happening to the most of the countries. I believe the good levels are only between 1.25 to 1.75.
So, I think Germany is holding on to its fertility. They can easily maintain it with small efforts. After all, reproduction is a natural phenomenon for humans.
If the conditions are good for a happy life, Germans will be reproducing more. 😜