Floating Character, Water3

I think i know what are you looking for! There is some sampel which can float rigidbody(s) whit "AddForce".

In your case (I suppose) u can use it like this;

 enter code here 
 if(float)
 {
    Uplift = uplift;
 }
 else
    Uplift = Vector3.zero;
 
 controller.Move(moveDirection * Time.deltaTime - Uplift);

And this is the Floater Script:

   using UnityEngine;
   using System.Collections;

 public class Floater : MonoBehaviour {
 public float waterLevel, floatHeight;
 public Vector3 buoyancyCentreOffset;
 public float bounceDamp;
 
 

 void FixedUpdate () {
     Vector3 actionPoint = transform.position + transform.TransformDirection(buoyancyCentreOffset);
     float forceFactor = 1f - ((actionPoint.y - waterLevel) / floatHeight);
     
     if (forceFactor > 0f) {
         Vector3 uplift = -Physics.gravity * (forceFactor - rigidbody.velocity.y * bounceDamp);
         rigidbody.AddForceAtPosition(uplift, actionPoint);
     }
 }
 }

UnTested! Hope be usefull!