distance calculation：I want to implement the same code functionality for distance calculation in Unity using SwiftUI. visionos

I use this piece of code in Unity to get the distance length of my model entering another model. I have set collision markers at the tip and end of the model and performed raycasting, but Unity currently does not support object tracking in VisionOS. Therefore, I plan to use SwiftUI for native development. In Reality Composer Pro, I haven't seen a collision editing feature like in Unity; I can only set the size of the collision body but cannot manually adjust or visualize the shape and size of my collision body.

I want to achieve similar functionality using SwiftUI, to be able to calculate and display the distance that my model A, like a needle or ruler, penetrates into another model or a physical object's interior. Is there a similar functionality available, or other coding methods to achieve this?

void CalculateLengthInsideOrgan()
{
    // Direction from the base of the probe to the tip
    Vector3 direction = probeTip.position - probeBase.position;
    float probeLength = direction.magnitude;

    // Raycasting
    RaycastHit[] hits = Physics.RaycastAll(probeBase.position, direction, probeLength, organLayerMask);
    if (hits.Length > 0)
    {
        // Calculate the length entering the organ
        float distanceToFirstHit = hits[0].distance;
        lengthInsideOrgan = probeLength - distanceToFirstHit;
    }
    else
    {
        lengthInsideOrgan = 0f;
    }
}