In General Relativity, time moves slower near massive objects where spacetime is curved stronger. In quantum gravity, the gravitational force is represented by the quantum field that refers to the probability of interactions, which can be in a simplified way described as exchanges of virtual gravitons. Such interactions usually involve a transfer of energy, momentum, spin, and other quantum numbers, but how is the gravitational time dilation explained at the quantum level?
Does the answer depend on a specific approach to quantum gravity? If so, what are the different explanations? I understand that we don't yet have a full theory of quantum gravity yet. I am just interested in the conceptual approach to the time dilation in the quantum theory.