I’ve been trying to get this thing to work for a while now, but it’s been giving me headaches.
(Not an experienced coder here), But i was able to add a sliding gallery to my site : https://www.spectrumtheories.com/products and it looks perfectly fine on mobile, then on desktop the width of the gallery is reduced, so what i added on the gallery css’s location was : overflow: unset;
which fixed it well on desktop. Now i can see the full gallery covering the whole page correctly.