Welcome back to the Wefugees Community and thanks for reaching out to us.
As far as I know, with a residence permit according to 28 (as parent of a German child) you can apply for the German citizenship after 8 years of having the residence permit or already after 6 years with German skills better than B1. You will find more information and a list of the other requirements here.
I’m I right on this dear @mbeon-Christine?
All the best,