According to the 23w33a changelog, the hotkey for narrator is Ctrl+B. However, this causes problems as the hotkey for toggling hitboxes is also Ctrl+B. This seems to cause the narrator hotkey to completely not work.
MC-264898
Narrator hotkey is the same as toggling hitboxes.
Resolved
Invalid
0
Hitboxes is F3+B, not Ctrl+B...
Whoever confirmed this did not verify it at all.