Why does the slider not work on ios?

Question

safari

There is a website, reviews , there is a slider - everything is OK on Windows and Android, but in IOS it’s just not there!) The slider is initialized, it put down classes there, but it doesn’t work, there are no arrows, there is no swipe. I didn't see any errors in the console. Perhaps there is not enough memory there, or what, I can’t imagine how to debug all this on windows. Browserstock is a little expensive hmm for one time then. In other places, the same slider and everything is ok.
slider itself