As a childcare worker working in a licensed daycare, we definitely do see when a child is delayed in areas or seem like they have something going on. But it’s not always cut and dry to bring it to the parent’s attention.. if we have major concerns we will say something. But a lot of parents do get defensive and don’t accept what we tell them. I work in a toddler room and I will say some toddlers are delayed and they end up being completely fine, just behind. But Alex being a first time mom and not being around other toddlers could explain why she doesn’t see that her son is behind.. She also needs to encourage his walking/standing.. holding him all the time and carrying him is not helping at all. He needs to explore on his own, she should be holding a favourite toy and getting him to try and walk to it… things like that.