What is the permissibility of breaking one's fast, eating, and drinking inside the mosque, and is delaying the Iqamah for the Maghrib prayer by ten minutes in Ramadan from the Sunnah?

It is permissible to eat inside the mosque, provided there is no risk of defiling it, and it is not permissible to discard food remnants therein. As for delaying the Maghrib prayer in Ramadan by ten minutes, there is no harm in it, especially if it is for the benefit of the people, combining the hastening of breaking the fast with catching the congregational prayer. The Prophet's Sunnah has indicated the consideration of people's welfare regarding the timing of establishing prayer.