Arrows can be visible there, add the next code in Theme Options > Theme custom CSS > Global:
@media screen and (max-width: 768px) { .single-product .swipers-couple-wrapper.swiper-entry .swiper-control-bottom .swiper-custom-right, .single-product .swipers-couple-wrapper.swiper-entry .swiper-control-bottom .swiper-custom-left { display: block !important; } }
Regards
