Yes. The Guest Picker module in the HomeRunner Toolkit replaces the single guest count with separate Adults and Children steppers. Both counts are passed to your PMS with the quote.
A Pets row appears automatically for listings that allow pets in your PMS. An infants row is not available on the booking panel at this time.
Extra-guest fees in Guesty. In Guesty, any extra-guest fee is calculated from the guest count received, and a child counts as a guest.