Why does the site not work on a stripped-down version of browsers?

Question

safari

Hello everyone, there is a site that works fine on desktops, if you go from a mobile phone through the normal version of the browser, then everything is fine too, but if you go to the site from a mobile phone or insta through their internal browser (a stripped down version of the usual one), then half of the buttons simply do not work , but this only happens on iPhones and then one of the five, tell me how you can run it through the emulator (I don’t know the normal one) or something else so that you can reproduce this error and what could it be ?, I thought that js does not work, but everything is fine there, since half of it works and only some functionality is not (

Answer 1

Perhaps the buttons are written not with butto tags, but with div / span / a and they do not have a style, this is a prerequisite for the iPhone system. Otherwise clicks just won't work.