Find all ScriptableObject in the Unity Project

EditorFindAllAssetsInProject.cs

public static T[] LoadAllAssetAtPath<T>(string fullFolderPath, string prefix, string postfix, List<T> list = null) where T : UnityEngine.Object
{
    string searchPattern = prefix + "*" + postfix;
    string[] filePaths = Directory.GetFiles(fullFolderPath
      , searchPattern, SearchOption.AllDirectories);
    //System.Array.Sort(filePaths);
    Debug.Log($"Found {filePaths.Length} paths to check for search pattern: \"{searchPattern}\"");

    if (list == null)
    {
        list = new List<T>();
    }
    foreach (string path in filePaths)
    {
        string assetPath = "Assets" + path.Replace(Application.dataPath, "").Replace('\\', '/');
        var asset = (T)AssetDatabase.LoadAssetAtPath(assetPath, typeof(T));

        if (asset != null)
        {
            list.Add(asset);
        }
        //Debug.Log(assetPath);
    }
    return list.ToArray();
}

// Example Usage: find
// string findPath = Application.dataPath;
// CustomScriptableObjectType[] objs = LoadAllAssetAtPath<CustomScriptableObjectType>(findPath, "", ".asset", null);