How to help my son -‘probably has ARFID

My 16 year old has always been a picky eater. To this day he has only drunk water. That’s actually not a bad thing. My concern has always been in the variety of food he eats.

Basically it involves:

Rice Steak Chicken Breaded fish Cooked or raw Peas Raw carrots, beans, green peppers and cucumber Mashed potatoes Corn flakes and other dry cereal Pancakes/waffles, etc

The rest of the food he eats involves snacks.

I have tried to encourage new foods; shopping with me to select new food and varieties on the above list…

Thoughts? Am I overthinking this?

He appears fearful to try new things…even things that I think he may even like…it appears to be cause him anxiety, and I am sad that he is missing out.