Get your A1C tested, that's the actual number that matters. The finger prick tests have a fairly large margin of error and even then I feel like the recommendation that you need to be under 100 all the time except for after meals is extremely counterproductive and only serves to stress otherwise healthy people out. Mine is usually 105-110 via the quick tests and used to spike up to almost 200 at night and my A1C was/is still well below the pre-diabetic range, usually a 5.0 to 5.1 with pre-diabetes starting at 5.7. Coming off of 16 hour fasts I'm still usually in the 105-110 range according to the handheld meter I have, I'm only ever below 100 if I test within a few minutes of finishing an extended fasted workout
Being fasted isn't the only thing that matters as far as your baseline glucose level goes, time of day matters too and your numbers will be higher in the early morning even before you've eaten. The number naturally spikes at night (3-4AM) and remains elevated until you've been up and moving for a while
The spikes at night were a problem, not because of any kinds of diabeetus related damage, but because I'd end up with hyperdipsia a few hours before it was time to wake up and basically be so thirsty I was in a panic as my kidneys tried to flush the excess which completely prevented me from getting back to sleep. To help with that I started taking berberine, it got the nighttime spikes down into the 130s which is pretty normal and I don't get hyperdipsia anymore. I think I started developing a tolerance to it so I swapped over to dihydroberberine, a stronger synthetic version of it, so hopefully by the time I develop a resistance to that I can swap back to the natural stuff
Even when I was dealing with the bad spikes, which was going on for a few years before I realized that's what the problem was, my A1C was still always a 5.1 or lower. If you want to monitor something, figure out what your baseline is, how long after a meal your glucose spike peaks, and then how long it takes to get back to your baseline. Those relative numbers are going to be the actual useful information since the handheld meters only give rough estimates (look at the box of test strips to see your margin of error, they're usually ±3 to 5, so a 105 may very well be a 100 anyway
imo if your meter says that you're back well below 140 within two hours of eating you're probably fine