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==== NavMeshAgent.RemainingDistance ====
This function does only respond with the current remaining distance if the path is straight.
It will thus return null or infinite instead of the correct distance.
There is a way to calculate the real distance by combining all calculated paths but keep in mind that this is performance heavy.

Example [[https://stackoverflow.com/questions/61421172/why-does-navmeshagent-remainingdistance-return-values-of-infinity-and-then-a-flo|On stack overflow]]: 
<code csharp> 
public static class ExtensionMethods
{
    public static float GetPathRemainingDistance(this NavMeshAgent navMeshAgent)
    {
        if (navMeshAgent.pathPending ||
            navMeshAgent.pathStatus == NavMeshPathStatus.PathInvalid ||
            navMeshAgent.path.corners.Length == 0)
            return -1f;

        float distance = 0.0f;
        for (int i = 0; i < navMeshAgent.path.corners.Length - 1; ++i)
        {
            distance += Vector3.Distance(navMeshAgent.path.corners[i], navMeshAgent.path.corners[i + 1]);
        }

        return distance;
    }
}
</code>