Please add Recovery Hearth Rate (HRR) to the Garmin Connect app It does not make much sense to do it after each exercise if you have no graph/feedback to see your progress over time.
It would be very helpful to have Recovery Heart Rate shown in various time periods for example 10 seconds, 30 seconds, 1 minute, 2 minutes. I personally use a heart rate strap to get the best HR values possible being a hearth patient.