Here Entity Spring 1.15.2-1.14.4 is a very useful modification, after installing which you will have a real spring for a bunch of boats, carts or even mobs if desired (as you have already understood, one of the objects will pull the rest).
This has many possible uses on water, under water, for transporting a large amount of resources, for moving many animals or even monsters. Now you can more easily move various things in your world and it adds more realism.
How to install Entity Spring Mod
- Download and install Minecraft Forge
- Download mod
- Unzip it and copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods