Is he too skinny?

I was wondering if my bearded dragon is too skinny.
He is about 20 months old.
I give him a few leaves of greens in the morning, he is really picky about them, usually eats a few. Right now he gets a small handful of watercress in the AM and eats most of it.
I give him 1" roaches, about 5-6 a few times a week.
I think the 1" roaches are a little too small, so I swapped my dubia roaches.com subscription for 1.25.

He is very active- he always wants to come out and he roams my room almost everyday, often more than once. He is always looking out the glass doors, and loves to come out.

I really don't want him to be unhealthy, obviously. If he's too skinny, I'll do whatever I need to to fix it for him.
Thanks

He needs more variety of veggies in his diet here is a website ignore the kale thing its a good staple feeder http://www.beautifuldragons.com/Nutrition.html to me he looks small for a 20 month old-- add worms to his diet horn worm butter worms super meal worms
Here are some websites for you shop them all and see which ones best fits you
https://abdragons.com/
www.dubiaroaches.com
www.reptilianarts.com
https://symtonbsf.com/
http://www.mulberryfarms.com/
www.joshsfrogs.com
https://aafeeder.com/feeder-worms/superworms/
www.coastalsilkworms.com
https://flukerfarms.com/crickets-live-feeder-insects/
I have not gotten anything from joshs frogs aafeeders or abdragons-- the others I have Mulberry is the only place I know of that has the butter worms and good buy on horn worms but they grow so fast I dont get the quantity for the price reptilian arts has real nice silk worms dubia roaches has real nice horn worms they send small usually -- flukers has the best super worms nice and big and healthy looking --you will need a plastic container for them w/ lids / holes and bran to feed - they ship them in tubes --