I'm not sure if this is the right place to post this, but here is my UX feedback:
I installed GrapheneOS and OSM and was surprised that OSM stayed silent. The fix was:
- Installing a TTS Library
- Go To Settings > Accessibility > Text-to-speech output > Set this tts library as "preferred engine"
Overall, it costed me maybe an hour.
If a TTS library would come pre-installed this would save others from the same experience.