Unable to create post type shop_order

I am attempting to create a Woocommerce order upon submission of a gravity form.
I used this snippet to make shop_orders post type available:

add_filter( 'gfcpt_post_type_args', 'my_gf_post_type_args' );
function my_gf_post_type_args( $args ) {
    $args['public'] = false;
    return $args;
}

Although I choose store order on the post title field, no order is created.

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