Hello Bamba21,
I got it since March 2019 and I am hold 2 years now.
And concerning about my girlfriend, she got her deportation ban before I was called to court which means she didn't get her documents throug the sorgerecht but through her asylum case. But assuming she did got negative results from her asylum then we can use the sorgerecht but in her now case was through her own asylum case. She got answer to her case on April 2018 and she got pregnant on September 2018.