I am having issues with my slideshow not displaying at all on certain mobile devices in portrait mode. It displays fine on desktops, mobile devices in landscape orientation, and occasionally works on larger phones in portrait orientation. I've searched the forums and tried out the suggestions there and nothing has worked so far. Any help is appreciated.
Send your store url
As i can see any Js code affecting your slider its height set to 0 in mobile so check in Asset-> theme.js code where from it affecting.
Its your store Js issue so cant send or check solution from front side that's why i just sent you issue why its happening. check in Theme.js file where slider applied may be it hide option in slider for mobile.