Praying that she has the strength and support to make it through such a difficult time🙏🏽

For those who dunno why 49th day.

Buddhist ceremony held in memory of a deceased person seven times, once every seven days, for 49 days after death.

According to the Buddhist view of the afterlife, human beings who die without attaining enlightenment are trapped in the eternal cycle of birth, death, and rebirth, and remain in the state of jungyu (Kor. 중유, Chin. 中有, a period of forty-nine days human beings need to wait after death before the next birth). The souls of the dead suffer repeated births and deaths for seven days if the conditions for rebirth are not present, and the seven-day period repeats seven times until a total of seven intermediate periods (49 days) have elapsed. According to this belief, repeated sutra recitation of the living during the 49 day period helps the dead to be reborn in a better world.

It probably means her dad is a Buddhist, but not necessarily herself.