So it seems I’m not fashionable or something as neither of my questions got an answer. But the same question was answer a day later… so if anyone finds this:
This does it. For the swiper - you can go to next slide with this:
bricksData.swiperInstances.yxpugq.slideTo(2)
Change yxpugq - the the id not of the container or slider itself but a data tag (devtools to find it ) set as data-script-id attribute on the slider.
I’m off now to study how to ask meaningful questions…