Welcome to the Wefugees community and thank you for your question.
First of all, since you are married to a German woman, you already have a right to get a residence permit. It could happen that Ausländerbehörde asks you to leave Germany, go to your home country and then come back with a visa in order to get said residence permit. It seems to be unnecessary, but it's lawful for them to do so. But technically you are not dependent on your asylum procedure or getting a residence permit through your child.
Regarding your appeal: German bureaucracy is not the fastest. Sometimes you have to be patient. If nothing happened after 3 months you can file a so-called "Untätigkeitsklage" at Verwaltungsgericht with the help of a lawyer.