Using Newton's equation of universal gravitation and mathematical calculus and limit calculations to prove that gravity has a Doppler effect. In this way, under the same distance, the velocity of the object is different, the gravitational force will also be different. If according to Newton and Laplace's point of view, the speed of gravity is very huge, then the general Doppler effect of gravity is negligible; if according to GR's point of view, the speed of gravity is equal to the speed of light, for objects with very high speed, such as the Sun and planets, the general Doppler effect of gravity cannot be ignored. https://www.researchgate.net/publication/357577073_Gravity_and_Velocity

This "alternative" idea has been discussed here before. The Doppler effect is a wave effect, but no waves are mentioned in the OP's "theory". No good evidence is presented in favour of the hypothesis, either.