.tws-checkout--field-id-phone .tws-checkout--field-label-text::before {
  width: 350px;
    content: "Mobile number for delivery";
}

.tws-checkout--field-id-phone .tws-checkout--field-label-text {
    visibility: hidden;
    position: relative;
}

.tws-checkout--field-id-phone .tws-checkout--field-label-text::before {
    visibility: visible;
    position: absolute;
    left: 0;
}

.tws-checkout--field-optional .tws-checkout--field-optional-label {
    display: none;
}