If anyone wondered if the leaked HRM-Pro plus will be released soon, there is this youtuber (Vegan Cyclist) who wears it in this picture on strava. You can distinguish it by the
Review: Garmin HRM-Pro Plus | road.cc
Amazon.com: Garmin 010-13118-00 HRM-Pro Plus, Premium Chest Strap Heart Rate Monitor, Captures Running Dynamics, Transmits via ANT+ and BLE : Sports & Outdoors