How to replace the input values of a checkbox to the email body with a line break in Contact Form 7.

functions.php

add_filter( 'wpcf7_mail_tag_replaced', function ( $replaced, $submitted, $html, $mail_tag ) {
    // In this case, the value of "options" tag will be replaced.
    if ( 'options' === $mail_tag->field_name() ) {
        $replaced = implode( "\n", $submitted );
    }

    return $replaced;
}, 10, 4 );