Hey mama, 20 days pa lang ang baby so hindi pa siya nakakakita or nakakarinig ng maayos, usually around 3-4 months pa lang sila nagsisimulang makita ng malinaw and mag-respond sa sounds! At birth talaga they can see light and hear, pero blurry pa lang lahat and parang tulog pa mostly, kaya natural lang kung parang walang reaction pa hehe. One of my mom friends was worried din back then kaya I told her the same thing, and by month 3-4 talaga she noticed the difference na. Pero kung may specific concerns ka with baby's development, good idea to mention it sa pedia mo sa next checkup!