Sonos has yet to announce whether or not they will support Apple Lossless. Read more here:

https://en.community.sonos.com/music%2Dservices%2Dand%2Dsources%2D228994/sonos%2Dsupport%2Dfor%2Dapple%2Dmusic%2Ds%2Dlossless%2Daudio%2D6858768
 

With Qobuz, you can currently stream 24-bit/48 kHz audio from the Sonos app. Hopefully this will be possible with Apple Lossless too.
https://support.sonos.com/s/article/1782?language=en_US
 

But Apple Hi-Res Lossless will probably not be supported on Sonos speakers.

Thanks. I am assuming Amazon HD is supported?

Yes, Amazon Music HD is supported by Sonos:

https://support.sonos.com/s/article/3248?language=en_US

I already have Amazon so loaded Qbuz under the 1 month trial to compare with Amazon HD.

So just to be clear, even if I play music directly from the Apple Music App via Airplay it still isn’t lossless?

I have to say, after changing my settings in Apple Music to lossless, playing music now through my Sonos One SL’s SOUNDS AMAZING!  I tried both on and off AND THERE IS A DISTINCT DIFFERENCE IN SOUND AND QUALITY.  It’s not hope, it’s real. So I have to believe Apple lossless works on my Sonos!  Supported or not on paper I sure hear a big difference. 

Are you using the Sonos app or Airplay?

Both!

Correction, I went through Airplay!!!!!!!, but if I then launched the Sonos app afterwards while the music was playing it didn’t seem to turn it any different, but I started by launching Airplay and the Apple Music app.  It really sounds FANTASTIC!!!!!