Hello,
There is no special option for this. So, I added below custom to Theme Options > Custom CSS > Mobile
.mobile-header-wrapper .header-promo-text span {
white-space: normal;
text-overflow: unset;
line-height: 1.3;
}
.mobile-header-wrapper .et_promo_text_carousel {
--promo-text-height: 90px;
}
Check if it suits your needs.
Regards