The dead person is not prayed until he is hidden from sight in his shrouds, so there is no difference whether he is hidden in his shrouds or hidden in his grave. It has been proven from the Prophet, may God bless him and grant him peace, to pray for the dead after he has been buried in his grave .

The consideration is The body was created from the dirt and returned to its origin, so there is no difference between it if it separates and protrudes on the surface of the earth or is located under the dirt, then it is one of them.