Try integrating AccessKit on it and also base yourself in Godot, which is an screen reader accessible engine in itself and also creates screen reader compatible games. https://github.com/AccessKit/accesskit
Blind developers, including from the game jam I’m hosting this February, would love to have more engines they can create with, and developers who make games blind gamers can play, too, also appreciate that more engines are accessible. If you do this, you’ll get starred in our Wiki and when people ask about accessible engines.
Seriously, if you do this, especially if you make the engine accessible in itself, you’ll then have a ton of blind developers also helping developing the open source engine. And maybe you’ll get me (I’m not a programmer, but hope to learn some programming) to try to learn your engine. (I don’t work with engines that don’t let me make accessible games, by principle)