You're lucky if they are alive. Seedlings are extremely sensetive and fragile.
Keep it in mind while interacting with plants, this is the period of life when they are most vulnerable.
Roots do not like light and can stop developing from it in addition to the threat of mechanical damage.
Buddy, your task is to create the best conditions, not to stress your plant.
There is no point in checking the roots by digging them up.
Any stress will slow down development.
Peace and good luck!