Gravity and time dilation are closely related phenomena, but it would be more accurate to say that time dilation is caused by gravity, rather than gravity being caused by time dilation.
According to Einstein's theory of general relativity, gravity is not seen as a force in the traditional sense but as the curvature of spacetime caused by the presence of mass and energy. Massive objects, such as planets, stars, or black holes, create a curvature in spacetime around them. This curvature determines the paths of objects and the behavior of light in their vicinity.
When an object or observer is located in a gravitational field, they experience a gravitational time dilation. This means that time passes at a different rate for them compared to an observer located in a region of weaker gravity. In regions of stronger gravity, where the gravitational potential is greater, time passes more slowly relative to regions of lower gravity.
So, while time dilation is a consequence of the gravitational field, it is not the cause of gravity itself. Gravity arises from the curvature of spacetime caused by the presence of mass and energy. Time dilation is one of the effects resulting from this gravitational curvature.