No worries, just based on your description alone, it doesn’t sound like it’s anything alarming yet. At 6 years old, it’s common that children might space out a little, because like I mentioned they cannot stay focused for too long unlike adults.

I found an online article which supports what I mentioned earlier, children at 6 years old usually only have attention span of about 10 to 15 minutes : http://day2dayparenting.com/qa-normal-attention-span/

However if this gets worst in primary school and affecting her academics and socializing in class, then I would highly suggest that she does a full psychological assessment by Primary 2