For now, you can use Apple Health or Health Connect as the bridge between Garmin and CoachRx:
Garmin → Garmin Connect → Apple Health/Health Connect → CoachRx
To make sure your data syncs properly, follow these steps:
Wear and use your Garmin device as normal.
Open the Garmin Connect app on your Phone and allow it to fully sync with your Garmin device.
Once Garmin Connect has synced, your available data should be pushed from Garmin Connect → Apple Health/Health Connect.
CoachRx can then pull the available data from Apple Health/Health Connect → CoachRx.
Important: Make sure you actually open Garmin Connect regularly. If the Garmin Connect app stays backgrounded, the data may not sync through to Apple Health, which means CoachRx won't receive it either.
Best practice: Open Garmin Connect and let it finish syncing before checking CoachRx for your updated data.