how to get length of files loaded with keras to dataset

I am trying to concatenate two datasets that were created using the keras.preprocessing.image_dataset_from_directory() with the paths as follows:

  val_ds = tf.keras.preprocessing.image_dataset_from_directory(
  Val_data_dir,
  image_size=(127, 127),
  batch_size=32)

Found 16 files belonging to 2 classes.

  train_ds = tf.keras.preprocessing.image_dataset_from_directory(
  Train_data_dir,
  image_size=(127, 127),
  batch_size=32)

Found 5216 files belonging to 2 classes.

  print(len(list(train_ds)))

When I print the length of the list in train_ds, it’s showing 131 when I’m expecting 5216 that it found when it loaded it from the directory. Can someone explain why? What other function should I use to get the number of files loaded in the dataset?