Time dilation caused by gravity and the sensation of being slowed down when jumping are conceptually related but not exactly the same phenomenon.
In general relativity, gravity is described as the curvature of spacetime caused by massive objects. This curvature affects the passage of time, resulting in time dilation. When an object is in a strong gravitational field, such as near a massive planet or a black hole, time appears to pass more slowly for that object relative to an observer in a weaker gravitational field. This means that clocks closer to the source of gravity will tick slower compared to clocks farther away.
On the other hand, when you jump and experience the sensation of being slowed down, it's due to the gravitational force exerted by the Earth. When you're on the ground, you are subject to the Earth's gravitational pull, which accelerates you downward. When you jump, you are momentarily free from that acceleration, and you experience a brief sensation of weightlessness. However, the gravitational force still acts on you, and as you move upward, it gradually slows your upward velocity until it brings you back down.
So, while both time dilation caused by gravity and the sensation of being slowed down when jumping involve the effects of gravity, they operate on different scales and have distinct mechanisms. Time dilation is a consequence of the curvature of spacetime, whereas the slowing down when jumping is a result of the gravitational force acting on your body.