I'm suggesting event actions that would trigger the keyboard on key press and key down conditions. This would make it easier to port games to mobile that a use a lot of keyboard events, because with this feature you could just simulate keyboard events through mobile taps or touches.
Essentially I'm looking for a feature like this plugin: https://www.construct.net/en/forum/extending-construct-2/work-in-progress-addons-30/plugin-simulate-keyboard-or-to-117029
This is already possible with behaviors using the "Simulate control" action. It's also possible to implement yourself in events providing you call functions from input events. Then you simply need to use a different event to call the function, and the game behaves identically to that input being pressed. Therefore there doesn't seem to be a separate feature to cover this.