Is it awkward to ask the admissions office what a 4 year old is expected to know?

My son is 4 and we're applying to a couple of schools for 2027. Last week I caught myself asking him to count backwards from 20 at the dinner table, because someone in a parents' group said one school asks that. He did it, then asked why I was being a teacher. I'd rather just phone the schools and ask what they look for at the interaction. Is that a normal thing to do, or does it come across as a parent trying to prep for the test? I don't want him walking in with a label before he's said a word.