SpawnerWithAssetReference.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AddressableAssets;

public class SpawnerWithAssetReference : MonoBehaviour
{
    [SerializeField] AssetReferenceGameObject obj;

    void Awake()
    {
        obj.LoadAssetAsync();
    }

    void OnDestroy()
    {
        obj.ReleaseAsset();
    }

    public void Spawn()
    {
        if( obj.Asset == null)
            return;

        var x = Random.Range(-3f, 3f);
        var z = Random.Range(-3f, 3f);
        GameObject.Instantiate(obj.Asset, new Vector3(x, 10, z), Quaternion.identity);
    }
}

SpawnerWithHandle.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AddressableAssets;
using UnityEngine.ResourceManagement.AsyncOperations;
using UnityEngine.ResourceManagement.ResourceLocations;

public class SpawnerWithHandle : MonoBehaviour
{
    AsyncOperationHandle<GameObject> handle;

    [SerializeField] string addressName = "White";

    void Awake()
    {
        handle = Addressables.LoadAssetAsync<GameObject>(addressName);        
    }

    void OnDestroy()
    {
        Addressables.Release(handle);
    }

    public void Spawn()
    {
        if( handle.IsDone == false) return;

        var x = Random.Range(-3f, 3f);
        var z = Random.Range(-3f, 3f);
        GameObject.Instantiate(handle.Result, new Vector3(x, 10, z), Random.rotation);
    }
}