There are no filters for the notification email. It is one fixed HTML template, sent with wp_mail().
You cannot change its subject or body in code, and it has no CC, BCC or Reply-To setting and no custom From address. The auto-reply to the visitor is available in the free plugin. The settings you can change are in the Email Notifications card of the form.
If you need a different message, send your own from the submission event:
php
add_action( 'formforge/submission_created', function ( $submission_id, $payload ) {
wp_mail(
'[email protected]',
'New submission #' . $submission_id,
wp_json_encode( $payload['fields'], JSON_PRETTY_PRINT )
);
}, 10, 2 );