I’ve tried CGMs multiple times and didn’t have any life changing experiences.

I did have a couple low and high readings, but even with a food log and going back to re-eat the exact same meal I got completely different results.

I think the exercise induced changes that help regulate blood sugar aren’t going to show up on the time scale of ordering a couple CGMs. It has to be a sustained lifestyle choice.

Took me about half a year to drop my baseline levels, so, of course, not instant and not within "a couple" CGMs, but "a couple" was enough for me to understand the trends.