You can do it by using interstitial fluid, which is how CGMs work.
But, in short, no, not yet: https://www.fda.gov/medical-devices/safety-communications/do...
But, in short, no, not yet: https://www.fda.gov/medical-devices/safety-communications/do...
Which - to be clear - is because the sensor chemically degrades over time. It's not just rent-seeking; they genuinely don't know how to make one that'll last longer.