Using wear os watch and sleep phaser

I have

  • a polar M600 --> wear os watch
    -sleep phaser

If I use wear os (start sleep for android with watch app) I have a HR graph
I I start from the phone sleep phase give me results.

Because sleep phase also watch my breathe I was thinking is it possible to use both?
Soi I can see breathe and hr graph in result. Is this possible?

The best you can do is said in this post here, where there is a way to get a HR reading while using the sonar, but not movement detection.

Wanting to combine the two features is a request that goes back many years.
Use both sonar and accelerometer for sleep detection?