The lab will most likely show the A1c reading which is roughly an average of the past 3 months. The libre system takes a snapshot in time (assuming it is calibrated correctly); for this reason, I find simple testing is better for me with type 2 diabetes, as I take the readings at approximately the same time ever day to judge the overall trends. Your blood sugar can and will change significantly throughout the day, particularly the hours after eating.
In my humble opinion, if you are not taking insulin, the libre system is best left for those with type 1 diabetes unless directed by your physician. (But Abbott does appreciate the extra money!)