tf.executing_eagerly() returns true even when in graph mode

Question

Why tf.executing_eagerly() returns True after tf.config.run_functions_eagerly(False)?

Python 3.9.13
TensorFlow version: 2.10.0

@tf.function
def my_func(a):
    print("Python side effect")
    return a + a

a_fn = tf.function(my_func)