What can I do for my deceased daughter, who was keen on matters of her religion, to increase her rewards and good deeds in the month of Ramadan, and how do I deal with her loss?

A Muslim must be patient and seek reward from Allah when losing a child, remembering Allah's grace in this matter, and that one who dies from an abdominal illness is considered a martyr. The Prophet, peace and blessings be upon him, gave glad tidings to whoever bears the loss of a child with patience, promising them a house in Paradise, and that their child will intercede for them. Among what can be offered to the deceased are sincere supplications and charity, especially ongoing charity (sadaqah (definition) jariyah).