Can't see any details in pictures taken under grow lights.........always take pictures in normal white light.
They appear to be healthy.
All plants grow at their own pace.
The 2 smaller ones could be in bigger pots, the small pots will be limiting growth by now.
Start a diary if you think you might want help/questions in the future, it makes giving answers a lot more informed.
You don't say if they are photos? autos?, soil? coco? etc.