When viewing your Supercharger sessions, Tesla has added a Share Feedback button at the bottom of each session that allows you to submit feedback.
When submitting feedback, you can leave a rating from one to five stars, share additional details and even attach up to three photos.
This is helpful if you come across any issues with a Supercharger stall not working. Tesla will often be able to tell a stall is not working through their Supercharging monitoring, but additional details may help Tesla understand what was wrong with the stall, such as cut cables.