Dear Geokojo congrats for your baby...yes you can take aufenthalterlaubnis through your daughter if you did vaterschaftanerkennung and sorgerecht 50% custody. If you did already vaterschaft and sorgerecht then Ausländerbehörde can give you formullar for applying for aufenthalterlaubnis. This is what I know because I'm In the same situation now. Just have some questions to our experts which were not clear for me. Would be good if you also hear our experts
Good luck