How to add keyboard shortcut to Tinymce Worpdress?

Question

Keyboard

The classic WP visual editor has predefined shortcuts for many buttons and functions. But not for everyone. How to create a new one? Not only for an existing button, but also for quick UTF code entry. For example,  to implement a non-breaking space. The problem is that the WP editor does not understand input from the keyboard, even if it has a programmed function. It also does not understand its own non-breaking space button - its formatting is not saved. The Internet and Words understand, but WP does not. How to heal?