This is carb time at its finest if your into that.
Your plants is going to stop stretching now and no longer make new leafs. The leafs you have will get bigger. This is the time to review what locations are going to be popcorn / sub pair.
I’m not implying you need to honestly it’s hard to tell at this point from the pictures but from what I can tell you look in great shape. Just remember take lots of pictures of day 21 of flower. When you harvest compare what you left to how it turned out. Then you will learn what not to keep