Moderators have been given an update on this by specialists, unfortunately there is no timeframe for Adaptive aptX but Samsung Scaleable is said to be offer similar technology. Whilst this statement refers to S10 and S20 @AntS thinks it will be similar for other relevant Devices.
Moderators have got update on APTX and seems no timeframe for Adaptive APTX at present, but specialists state that Samsung Scaleable is very similar.
At the moment S10 and S20 series support traditional aptX.
What it does offer, however, is Samsung Scalable. That is closely similar to Adaptive AptX, but has a wider range of bitrates. Samsung Scalable can scale to any bitrate between 88kbps to 512kbps, and should be always using the bitrate that provides best quality audio while maintaining a stable connection. Adaptive AptX only scales between 279 to 420kbps."