A utility script to find every component of a particular type in a scene. Not sure what the results will be if you have multiple additive scenes loaded.

Helper.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class Helper : MonoBehaviour
{
	public static List<T> FindThemAll<T>(bool includeInactive = false) where T : UnityEngine.Component
	{
		var scene = SceneManager.GetActiveScene();
		var rootObjects = scene.GetRootGameObjects();

		var results = new List<T>();

		foreach (var go in rootObjects)
		{
			var found = go.GetComponentsInChildren<T>(includeInactive);

			if (found.Length > 0)
			{
				results.AddRange(found);
			}
		}

		return results;
	}

    // Start is called before the first frame update
    void Start()
    {
		var test = FindThemAll<AudioSource>(true);
		
		// This should spew the name of every gameobject with an audiosource attached.
		foreach (var tf in test)
		{
			Debug.LogFormat("found: {0}", tf.name);
		}
    }
}