@fireborn I can ask them. I assume that they either have their own build of GrapheneOS which includes something like eSpeak NG, or that they enlisted someone's assistance when setting the device up.
I understand that both of these options might not be feasible for some people, but they are certainly options until there's a permanent solution that works out of the box.
The article as it stands right now unfortunately gets things about GrapheneOS works incorrectly (such as the section about sandboxed Google Play which has led many people to agreeing with you based on a false premise that we include Google Play by default, which we don't).
It is really causing harm to the project and is very saddening to our team because we're being accused of being ableist or not caring about accessbility. I don't believe that this is the purpose of the article, but rather pushing for a solution and potentially getting the word out to help a reasonable solution be developed, whether by our team or a third-party contributor. I don't believe the article currently does that and I really wish we weren't put into this position of having to defend the project and ourselves by explaining we're not something that we aren't.
Unlisting it so that it can be reworded (I am happy to help provide input and make sure things are at the very least factual) seems like the best option right now, if you do not want to delete it instead.