ThanksThere are couple that
There are a couple that you can wear like a ring bit they are subscription based.
Oura Ring: the most accurate sleep and activity tracker is all about you: it measures the physiological signals of your body, understands your lifestyle, and guides you to make your own optimal daily choices. The ring features scientifically validated sleep tracking and personalized guidance.ouraring.com
and this one
I did see the Whoop but it doesn’t and the Oura ring is the same, measure for AFib. When I had my AFib “attack” the Apple Watch as good at looking at that. Thanks again though for taking the time to reply.