This is a repeat of a request posted in 2016. Now with the new and easier to implement flip tool it would seem appropriate that it be added to the right-click context menu.
Flip Along was in the Context menu for years until the new Flip tool was added. It existed in 2016. For that matter Flip Along was in the context menu at least back to version 3. Here’s a screenshot from that version.
The Flip tool added at the request of many users who couldn’t figure out which Flip Along option to use in each situation. You can add keyboard shortcuts for the three Flip Along functions now.