In the Muslim world, there is a tradition of distributing food in the neighborhood or inviting people over for Iftaar. It is from the Sunnah to make a supplication for the person who shares their generosity with us.
You don’t have to say this du’a on the host’s face, you can make the du’a in your heart (with sincerity). The angels will say ameen for you too. Such a beautiful dua! Share it with your family and friends.