No heart rate with Garmin 520

I see my heart rate stats on my Garmin but Zwift doesn’t pick them up., in either the mobile or on my Mac.

Want are you using for a HRM?

 I am guessing you are using a Garmin HRM. If that is true Garmin is Ant+ only so you would need an Ant+ dongle to get it to connect.

Yes Garmin, alrighty.

 

Thanks.