Get the hidden values

Hello,

I want to do stuff once the cf7 form submits.
I am using
add_action(‘wpcf7_mail_sent’,’save_my_form_data_to_my_cpt’, 10, 1 );

to hook my code on mail sent action. I want to read the posted data. When a user fills normal input fields you get the value as follows:

example:
for this cf7 field:
[textarea your-review placeholder “Your Review”]

you would use:
$submission = WPCF7_Submission::get_instance();
$posted_data = $submission->get_posted_data();
$posted_data[‘your-review’];

————–

I want to access the value of a hidden field
example on cf7 form:
[dynamichidden dynamichidden-email “CF7_GET key=’email’”]

How do I use the value of this hidden field on my hooked function (described above)?

Thank you for your time
Marios Neophytou