How do I verify that external HRM is used?

I did pairing of new Fenix 6 Pro and the old HRM Premium strap. It looks fine. But when I start an activity, I'm not really sure that the external HRM monitor is used - in my old Forerunner 220, there was a confirmation message that the HRM has been connected.

Does Fenix 6 Pro lack such confirmation? Is there any other way how to find out which HRM is used?