Hi,
I’ve also been experimenting with trying to get responsive tables to show properly on mobile.
The plugin I found which did the trick is TablePress – https://en-ca.wordpress.org/plugins/tablepress/. The basic plugin is not responsive, but there are add-ons available from the site, one of which adds responsiveness in 3 different ways depending on your layout needs. A donation of $9 is recommended for the add-on but it’s not mandatory.
Hope this helps,
All the best,
Helen