I was quite surprised to read in an earlier post that the writer had set up their Apple Watch to receive AF notifications. Apple are quite clear in their set up procedures that these notifications are NOT designed for people who have been properly diagnosed with AF by a doctor. Indeed you are specifically asked to confirm whether or not you have been diagnosed- if you answer ‘yes’ then the software prevents you from setting up such notifications .
Like BobD and others I’m a great believer in listening to my body and as I’m very symptomatic to AF it’s pretty easy to tell when it happens. You can still use your watch/IPhone to check you’re heart rate or send off an ECG to your EP/nurse.
No doubt Apple have legal and other reasons for this - plus of course the watch is simply an aid and not a diagnostic tool.
Hope this is helpful.
Best wishes.