Due to multiple conflicting and non-working shortcuts on iPadOS, rather than having a mismatch of Ctrl and Cmd shortcuts, we will be moving all shortcuts on iOS to be Ctrl by default like on Windows, Linux and Android.
We hope this works as a better solution! We will test out the highlight key especially to make sure it isn’t overridden by the backspace functionality you found @Fizzster21. In the meantime you can also customize iPadOS’ default Shortcuts to make sure they don’t override Supernotes shortcuts.