This is a good example of where the auto-hidden scrollbars on mobile/touch browsers aren’t great…
Discourse only officially supports Chrome & Safari on mobile, which means we can style our own scrollbar using CSS like ::-webkit-scrollbar (support). Mobile Firefox users would see no change.
I think what I would prefer to do, which would support all mobile browsers, is to add a fade to the right of the table once it gets wider than the content of the post. Then at least there’s a hint to see more even if there’s no explicit scrollbar.
The problem with that is that currently we overflow: hidden anything within .cooked as a bit of a safety so post content can’t break the page layout… so we can’t style overflowed content when there’s no visible overflow.
We might not need to overflow: hidden post content anymore? I’ll take a closer look and see if it’s sane to remove it, and if not I can add a visible scrollbar for webkit on mobile.