No, unfortunately, HX Edit has not yet been made available for iPad use. This makes sense though since the iPad is primarily a mobile device and HX Edit is normally used as an editing and control application for the Zoom's H-Series hardware models.
However, if you're using the Zoom H6 Portable Audio Recorder, you can make use of the mobile app, Zoom H6 Control, which is available for both iOS and Android devices. This app allows you to adjust parameters and system settings, monitor levels, and even make basic editing and mixing adjustments (as long as your iPad is running iOS 10 or later). A full list of H-Series supported features can be found here: https://www.zoom-na.com/products/h-series.
For more information about the Zoom H6 Control app and how it can be used with the H6, you can check out this article on their website: https://www.zoom-na.com/zoom-h6-control.
Overall, it looks like the iPad can still be used with the H6, even though it can't yet support HX Edit. If you need help or have more questions, you can get in touch with Zoom's Support team at https://www.zoom-na.com/contact/support.