Placeholder not visible on mobile devices

i am using elemntor form
enter image description here

i notice that in desktop show input typa date in in mobeile device create another input type date that not visible place holder

<div class="elementor-field-type-date elementor-field-group elementor-column elementor-field-group-field_bed31bd elementor-col-50 elementor-field-required">
                                                <label for="form-field-field_bed31bd" class="elementor-field-label elementor-screen-only">
                                Date de naissance                           </label>
                        
<input type="hidden" name="form_fields[field_bed31bd]" id="form-field-field_bed31bd" class="elementor-field elementor-size-sm elementor-field-textual elementor-date-field flatpickr-input" placeholder="Date de naissance" required="required" aria-required="true" pattern="[0-9]{4}-[0-9]{2}-[0-9]{2}" max="2006-12-31" readonly="readonly">

<input class="elementor-field elementor-size-sm elementor-field-textual elementor-date-field flatpickr-input flatpickr-mobile" step="any" tabindex="1" type="date" placeholder="Date de naissance ">
</div>