sign of intellectual disabilities

Usually when we rant about our baby's development like 'Why isn't my baby walking yet?' or 'Why doesn't my baby have teeth yet?', most people will respond with things like 'It's okay... every baby has their own time' or 'Mine was like that also, but it's okay, don't worry.' But I just read about intellectual disabilities, and now I can't stop thinking about it. It said the signs are: - Delayed developmental milestones, such as crawling, walking, or speaking. - Difficulty with social interactions or limited eye contact. - Lack of interest in toys or objects. - Trouble following simple instructions or understanding simple concepts. - Persistent difficulty in learning new skills or concepts as they grow older. - Challenges with problem-solving or reasoning tasks appropriate for their age. Basically, everything we have been concerned about—at least once! What do you think, Parents?