Sorunu kendim çözdüm. Bir de wp simgesi ekledim.Kodu şöyle bırakayım. İhtiyacı olanlar buna göre kullanabilirler.

<dt class="lead-field-heading tw-font-medium tw-text-neutral-500">
                        <?php echo _l('lead_add_edit_name'); ?></dt>
                    <dd class="tw-text-neutral-900 tw-mt-1 lead-name">
                        <?php echo(isset($lead) && $lead->name != '' ? $lead->name : '-') ?></dd>
                    <dt class="lead-field-heading tw-font-medium tw-text-neutral-500">
                        <?php echo _l('lead_add_edit_phonenumber'); ?></dt>
                    <dd id="tw-text-neutral-900 tw-mt-1">
                        <?php echo(isset($lead) && $lead->phonenumber != '' ? '<a href="tel:' . $lead->phonenumber . '">' . $lead->phonenumber . '</a>' : '-') ?>
                        <?php echo(isset($lead) && $lead->phonenumber != '' ? '<a href="tel:2' . $lead->phonenumber . '"><span style="font-size: 1em; color: red;" ><i class="fa-solid fa-phone"></i></span></a>' : '-') ?>
                        <?php echo(isset($lead) && $lead->phonenumber != '' ? '<a href="tel:5' . $lead->phonenumber . '"><span style="font-size: 1em; color: green;"><i class="fa-solid fa-phone"></i></span> </a>' : '-') ?>
                        <?php echo(isset($lead) && $lead->phonenumber != '' ? '<a href="https://wa.me/' . $lead->phonenumber . '" target="_blank"><span style="font-size: 1.2em; color: green;">&nbsp;<i class="fa-brands fa-whatsapp"></i></span> </a>' : '-') ?>
                    </dd>