I just realized by default the scrollbars are hidden on MacOS browsers, and only visible while scrolling. This creates a problem in some parts of the website where without seeing the scrollbar it's hard to notice that there is scrollable content.
I looked around the internet, but couldn't find any fix that also takes into account that scrollbar customization is not supported by newer versions of iOS.
Simple example:
<div class="wrapper">
    <div class="content">
        The content
    </div
</div 
.wrapper {
    width: 300px;
    height: 400px;
    overflow: auto;
}
.content {
    height: 800px;
    background-color: #fffaaa;
}
