Database

[{_id:1,"menu":[{"dishCategory":"61e6089f209b802518e2b4a4","dishMeals":[{"dishMealName":"Burger King","dishMealIngredients":"Burger lepinja, bbq sos, berlin sos, zelena","dishMealPrice":5}]}]}]

Query

db.collection.update({"_id":1,"menu.dishCategory":"61e6089f209b802518e2b4a4"},{$push:{"menu.$[menu].dishMeals":{"dishMealName":"Snack & Fried","dishMealIngredients":"Potato","dishMealPrice":2}}},{arrayFilters:[{"menu.dishCategory":"61e6089f209b802518e2b4a4"}]})

Result