The film is a spinoff and is separate from the next chapter of the main series, “A Quiet Place — Part III". The film’s cast and plot are still under wraps (I'm told the script hasn't been written yet), but the title suggests that the spinoff will follow a new group of survivors during the earliest days of the invasion of alien creatures who can detect the slightest noise. The first moments of that invasion were shown in the opening scenes of “A Quiet Place — Part II”.