Tables, columns and inline images are not supported on all channels where you can publish the whole article. Medium, Blogger, Facebook Instant Articles and Google AMP are some examples.
Everything that you create in the editor needs to supported on these channels as well, in order to make the creation and distribution of content a flawless process.
As a workaround, It is possible to embed a table using our Airtable integration or you could also embed a screenshot of an already created table directly into your story.
We will be looking into additional solutions, such as Google Spreadsheets and/or our own table system, which could then be opened as a popup in non-supported channels.