Your situation is not a big problem, and it has no obvious impact on the gearbox. Don't worry.
1. First of all, the impact of your vehicle is not great, because your front bumper buffers all kinetic energy, only damaging the front bumper, and even the water tank is not seriously damaged. The bumper has played its due role, protecting the engine and gearbox of the car;
2. During the impact, the impact only stays in front of the engine, and it is impossible to damage the gearbox behind the engine;
3. The automatic gearbox does not directly mesh gears, but transmits power to the back through liquid. Even if the car stops instantly, it will not damage the metal parts of the gearbox;
4. If you are really uneasy, I suggest you go to the 4S shop for a comprehensive inspection to ensure the safety of the vehicle.
I wish you a smooth solution!
Abin will answer for you.