HGBA1C 5.7% but blood sugar levels are always normal and I am pretty fit on average so I’m super confused

I am super confused about this because I workout around 4 times a week burning atleast 700 cals a day. I am 6’2” and weigh 180 pounds which is considered healthy. I eat 200-250g of carbs a day. I recently got a blood glucose monitor and my reading is always normal throughout the day and even after eating. The only time it’s high is during fasting (around 104). Any idea if this is normal or what I can do to improve my levels? Thank you so much in advance for any advice

EDIT 1: Here are my stats: Age: 26 Height: 6’2.5” Weight: 180 pounds BMI: 22.8 Body fat: 18.8% Visceral fat level: 7

EDIT 2: That being said, almost everyone in my mom’s side of the family has diabetes nothing extreme or serious though