What do you expect to happen versus what really happens? Is the problem that "finished" isn’t printing? You could await the function instead of the signal
await cutsceneAction(part1dialogue[i][0]["action"])
print(cutscene_action_finished.is_connected) does not print if the signal is connected to anything it prints the function itself, that’s why you see ::is_connected instead of true or false, but your code posted doesn’t connect to the signal anywhere as await is not related to signal connection.
Make sure to paste code instead of screenshots