It is likely that your HbA1c was taken on a TOSOH assay designed for persons from a caucasian heritage, on this unit my A1c reads 2 points higher as I am also black, which is normal for persons from an Afro background. Ideally you would get measured on a Boronate Affinity assay; to get this I did used a private company Medichecks. What is more important is that you keep spikes low circa 1.5-2.0 mmol/L. You do not need to be hungry. The below meals (15th April) sustained me throughout a day, with 2 bouts of weight training and walking:
Breakfast: Kippers and Butchers burgers, followed by nuts, berries and Greek yogurt
Dinner: Nandos seasoned aired fried chicken and salad, with melted 100% dark chocolate and nuts and pork puffs
The next morning 3.9 fasted blood glucose
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Remember any meal can be adjusted to low carb / keto, so I have curries, chilies, lasagna (butter nut squash), crumble (almond flour based), ribs without the gunk etc.
Only severe Covid put me back to 42 (incdiently the same as when I was heavily plant based and 3 hours of exercise) at my January A1c, due to the steroid drugs sending me from 4's to 16 +. I Ketovored through this to get a 40 A1c on the TOSOH and 38 on the Boronate Assay 3 months later (same blood sample with Medichecks)
I did exactly what you did, here's a post of mine that surmises
https://www.diabetes.co.uk/forum/threads/my-progress-cgm-food-exercise-results.183005/
Now I try to focus on sleep (really so important) and occasional spot checks, so last week I wore a CGM
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So while I don't believe the A1c predicted, I know the variance was about right for me.
Whilst I a possibly you have discordant results, variance and a flat-ish glucose graph, count for more. Fasting insulin being less than 6 is recommended by many low carb Doctors (mine is 5.1), low Trigs (fat in the blood stream, mine are between 0.3 and 0.4), high HDL (mine are currently 3), a low HS-CRP (general body inflammation, mine is 0.3), low blood pressure (mine is 120 / either 70 or 72 (can't remember)).
Testing and regime burnout comes to us all. Back off and trust the process. Some of my workouts are now just 20 minutes, 5 of that being a warm-up - then a light, medium and moderately heavy set of giant sets of lifting with no rests and walks after meals.