If you are willing to stream your music, Qobuz has some 24/44.1KHz music as well as some 24/96K and 24/192K material. What's available all depends on what the record company releases.
However, as noted, anything released as Redbook CD will be 16/44.1K.
However, as noted, anything released as Redbook CD will be 16/44.1K.