Can you add Garmin HRM to sleep2 app so that it can be more accurate or at least allow HRM to be worn overnight?

Will wearing HRM overnight be better?

If not why not add support to 3rd party apps like Sleep2 for better sleep tracking? Polar already has the support.

We need amazing sleep tracking, make it possible or buy out some company with statistics. Use phone's mic (with due permission) to track snoring etc. Why not Garmin? Why not?