Indices are based on order of horizontal graph traversal (bottom-up) and are
1-based. If name and index are both provided, index will take
precedence.
get_layer(object, name = NULL, index = NULL)A layer instance.
Keras model object
String, name of layer.
Integer, index of layer (1-based). Also valid are negative values, which count from the end of model.
Other model functions: 
get_config() 
get_state_tree() 
keras_model() 
keras_model_sequential() 
pop_layer() 
set_state_tree() 
summary.keras.src.models.model.Model()