Definitive way to enable ESC-key-like functionality for Obsidian on iPhone

Has anyone provided a good solution to the lack of an escape key on iPhone yet, for vim mode? I feel like this needs a definitive solution, and I’d be willing to work on it if nobody has, yet. Not an external keyboard. Just a plugin that gives a good way to enter the escape character, like a special button above the keyboard, or a special character sequence that gets remapped to the ESC key code, etc. What strategy would be the best solution for implementing this, if writing an Obsidian plugin? Like, the most natural way to work within the confines of iOS, and not a kind of awkward workaround.