Automatic Setting

I recently fell in love with the Dolby Atmos feature on Apple Music. I am also an audiophile with several amplifiers and grand speakers. I read the automatic feature in Dolby Atmos settings that states a stereo format is downloaded of the song as well so when connected to non compatible devices; apple music will play the stereo version. If I have my settings set to download songs at Dolby Atmos and Lossless, connect my phone to my amplifiers that are not Dolby Atmos with the automatic setting enabled, will the Lossless file be playing? Or is the stereo version playing the Dolby Atmos quality, just without separation? The reason I have this question is because the Dolby Atmos symbol disappears without stating "Hi-Res Lossless" under the timeline of the song— it is just blank.