The case was initially referred to the CJEU for a preliminary ruling, see here: Germany, Federal Administrative Court [Bundesverwaltungsgericht], Applicant (Eritrea) v Federal Office for Migration and Refugees (BAMF), 1 C 26.16, 27 June 2017.
The CJEU pronounced a judgement in this case: European Union, Court of Justice of the European Union [CJEU], Milkiyas Addis (Eritrea) v Bundesrepublik Deutschland [Federal Republic of Germany], C-517/17, ECLI:EU:C:2020:579, 16 July 2020