Falling off growth chart

Since birth my son was 30 percentile for height and 50th for weight and head circumference.

He basically stopped gaining at 7 mo when he started walking. Since about 9 mo he hasn’t stopped moving (literally moving sleeping or eating) but now at 11 mo he’s still only about a pound heavier than at 6 mo. He’s not even 19lbs

I just looked that up on the growth chart at its about 10 percentile.

My dr said “Hopefully he’s got a good appetite and will catch up”.

But I wish I had asked if there are things I should be feeding him. He’s on stored breast milk and real food-he eats everything!

Anyone know any good weight gain for baby food.