I recently purchased a Tacx Flux 2 trainer, which I use in conjunction with :
1. Garmin Edge 520
2. the Tacx Desktop app.
3. Macbook pro (using the latest version of macOS Catalina)
The Tacx app works well, and is a pleasure to use with great films and displays all the relevant data with the exception of my Heart Rate.
I have spent numerous hours trying a variety settings on the 3 components but cannot get a Heart Rate reading on the app. My Edge 520 continues to show my HR in the usual way.
I would welcome any advice on the settings that I should be using to get the Heart Rate display.