It's absolutely worth the experiment of getting a continuous glucose monitor for a couple of weeks to see where your lifestyle is at.

I quite liked the Freestyle Libre 3, which you can buy online without a prescription. The software is rudimentary but it'll give you the information that you need. A single device will last for (up to) 2 weeks, which is better than the alternatives I looked at, hence my recommendation.

IIRC from Peter Attia's book Outlive, you are aiming to keep blood glucose at an average of 100, with very few spikes above X (I think he said 160, but would need to check). He does suggest once you have measured for a few days to push the envelope with carbs, sugars, etc and see how your body reacts.