If chat appears, the AI path may already be working
The most useful clue is whether Verity writes messages in chat. If messages appear, the interaction and response layer is at least partly working. That does not prove every setup detail is correct, but it does mean the next question is sound output, not simply "where is the correct Verity Mod download?"
On Java, voice can depend on the selected build, TTS integration, voice add-ons, local system permissions, and AI provider behavior. On Bedrock and MCPE, voice or sound problems can come from resource pack activation, Minecraft sound sliders, device silent mode, or conflicts with packs that replace UI or audio assets. Handle those layers one at a time.