Smart watch to monitor blood sugar

Are you wanting to monitor blood glucose due to having type 1 or 2 diabetes? From what I’ve read there is questionable reliability of blood glucose monitoring in which there is no placement of the sensor under the skin. I haven’t tried monitors that are on top of the skin, so I can’t comment. But, is there any reason you couldn’t try a continuous glucose monitor (sensor is under the skin)? There are quite a few options now. I think many insurance companies cover them too.

I use a cgm that’s built in to my insulin pump (Medtronic 780).

My brother has one. It keeps going off in mixed company,
letting everyone know his sugar is too high and he'd better lay off the cookies.

I have seen reviews of these smart watch glucose monitors and they are all either hit or miss. Mostly miss. Judging from the reviews the results are as good as throwing dice. Rarely correct. Mostly wrong. One would need to do finger sticks to check the accuracy a lot.
A watch that connects to a CGM is a totally different story.

Not approved by FDA. Diabetes Dr has not heard any reviews.