ABSOLUTELY. What is the worry? That the kid is scamming you to get more food which they are then going to turn around and sell to their friends on the playground? Kids, especially infants, haven't learned to have a dysfunctional relationship with food and hunger. If they are hungry, they show it. If they aren't, they show satiety. Definitely don't mess with this and you'll get a human with a good food relationship.

You've got cause and effect wrong on the more food = food coma thing. Both are caused by the same thing but hunger can interfere. The same thing is a growth spurt. When a kid is in a growth spurt they eat a ton and sleep a ton. Now, hunger can prevent sleep even in a growth spurt. But that growth spurt is going to spurt and it is a great thing you are doing to support it.

Your parenting instincts ROCK.

That is the correct thing to do. Infant appetite is linked to metabolism. If they are more hungry it is because they need it.

Just make sure not to feed them salty/ sugary foods as it can throw that off some.