According to Newton’s third law, a falling stone from the side of the Earth is affected by the same modulus of attraction force F1

According to Newton’s third law, a falling stone from the side of the Earth is affected by the same modulus of attraction force F1 as the force F2 acting on the Earth from the side of the stone (Fig. 5-3; for clarity, the scale is not observed). Why is the acceleration of the falling stone noticeable, but the acceleration of the Earth not?

The forces of attraction equal in magnitude impart different accelerations to the Earth and the stone, since the masses of these bodies are different.