WearOS watch heartrate as sensor not detected

I am using an app on my Galaxy Watch 5 Pro to share it's heartrate via Bluetooth. If I try to start an activity on Strava on my phone, my watch shows up as a potential HR monitor, and is able to be connected. If I stop the app on my watch, it isn't shown on Strava, so I figure that the app on itself works fine. However I am completely unable to have the watch detected on my Edge Explore 2.

Any ideas would be much appreciated!