Utensils

So my son is in speech therapy and today I was told that he is very developmentally behind because he doesn't use utensils, won't drink from a cup (will only drink from great value water bottles, yes only great value and it has to be cold) and relies on me for everything and idk what to do. I never saw a problem with it until the therapist brought it up, she said I need to let him be independent but like he has sensory issues so he doesn't like getting dirty, he has no interest in the utensils even if I help him. Help bc I don't know where to start, I always figured he would just do stuff on his own when he starts talking and I can tell him that he needs to do it on his own.