Because Germany won a quota place in the Mixed Doubles at the European Games (and their entrants need to come from their successful Teams, also qualified, then this adds one extra space into the Singles Qualification for each of Men and Women.
"Any qualified athletes in Mixed Doubles must be part of the team composition if their NOC has qualified a team of that gender"
Does this extra place get filled at the Singles Qualification Tournament, or via the World Ranking? I think it is the Qualification Tournament, up to a maximum of 8 (when you allow for other situations like Germany's, from a minimum of 2 places at the Tournament), and then after that the World Ranking, but my head hurts now. I agree that Table Tennis has made this the most complicated process possible.