Noise

Hi, recently I notice something on my 2023 tundra, I start the truck, everythings is fine it run’s very smooth even completly cold, no valve noise nothing. The things is it’s seem like when I put the truck in D and just leave gently, I hear somethings like valvetrain noise or something like that but when in in park, nothing it’s like the high pressure fuel pump kick’s on only when I press the gaz because when I let off throttle it desapeare, I park the truck give him some rev and nothing Even a noise fully smooth. It drive me crazy. Could the high pressure fuel pump be more loud when cold because couple of corner later it’s desapear. Thanks you all