GravityTweak
This mod allows you to customize the falling speed of various blocks in Minecraft. You can adjust how fast or slow falling objects like sand, gravel, or other gravity-affected blocks will descend.
Speed Configuration
The exact falling speed is set through the configuration file, giving you complete control over this parameter. You can make the fall almost imperceptible or, conversely, lightning-fast - everything depends on your preferences.
Configuration Location
The settings file is located at: .minecraft/Configs/gravitytweakconfig.json5