Not sure what you are asking, There are watch faces that show the current heartrate so I suggest to use that. For any activity you can select it as a data field. Perhaps you are looking for a widget ? https://apps.garmin.com/en-US/apps/31238ffc-7e73-4b13-9d54-268ec456387c might fit the bill for you perhap. Let me know what you are looking for and I will try to answer.
