Apple Watch ECG

How accurate are the Apple Watches? I have a Series 10. About three weeks ago, I was in hospital due to a high heart rate and have been referred to a cardiologist specialist. So far, my watch hasn’t captured anything too concerning other than PAC. My last watch I had the AF setting turned on, which said I spent 2% or less in AF every week, and on my new watch I have it off as I haven’t been diagnosed with AF and the watch hasn’t detected any arterial fibrillation. Is it better to keep the AF setting off?

Here is a couple of readings if anyone is interested