my autistic son have me speechless

I just want to say that my 3 year old son is autistic and he is just incredibly smart, he knows his numbers perfectly up to 20. He can identify each letter of the alphabet and knows how to put them in order forwards or backwards. He also can identify each color

of the rainbow and can put them in order.

Is this normal? We do lots of educational videos and singing. Is he ahead to be 3 or is that about right? Or does his autism play a role in it? His attention goes to those subjects A LOT. Constantly repeating numbers and the alphabet. I am just surprised and super happy to be his mom 🧩💚