I just got the Galaxy Watch6 and noticed right away that it is very inaccurate with heart rate detection compared to my older Watch4. It doubles my HR often and other times its just 20-40bpm over my arm band. It seems this accuracy difference between these watches has been confirmed on YouTube with some pretty intense testing. I have watched videos on placement and tightness etc and I am not new to HR watches.
So with that said.. does the watch6 support pairing a different heart rate sensor for workouts? What isn't a solution to me is pairing a sensor to my phone.. because I do not have my phone in range during a workout and as far as I have seen doing that you still dont get to see the more accurate HR on your watch.