Known allergen, one of 14 with mandatory labelling requirements in EU. https://ec.europa.eu/food/safety/labelling_nutrition/labelli...

Also, soyabean is mostly GM, which doesn't go down so well in EU either, though some varieties are approved for use - possibly due to further labelling requirements: https://www.fsai.ie/legislation/food_legislation/gmos/labell... and the association with the (over)use of glyphosate.