luja
Unable to answer "Does Netto Marken-Discount offer kosher products?" for https://osm.org/node/3149004576 via StreetComplete 32.1:

as with any German super market there are some Kosher products like Kellogs Cornflakes which have a kosher certification on the packing (Manchester Kosher). Or Heinz Tomato Katchup. But there is no special Kosher department.