I have a React page where users can trigger a Dialog modal window with some content (text) in it. Content can be scrolled (scroll=paper
is set for Dialog component).
I was following this example (Scrolling long content) from Material-UI documentation. When I run this example in documentation site — I see scrollbars when I scroll on mobile devices. However, when I click Edit in CodeSandbox and try to run it there (generated link), I can scroll the content, but scrollbars are not visible. For example, on mobile device — an iPhone 6s (iOS 13.3.1) scrollbars are not visible in Safari browser when scrolling, but visible in example in documentation when scrolling. On my site same thing happens, I can't able to show scrollbars.
How to always show native scrollbars when content is being scrolled on all devices in Dialog React component?