My bluetooth receiver took a while to start sounding good, i use it battery operated using Tidal and my phones mobile data:
https://www.aliexpress.com/item/CRDC-Bluetooth-5-0-Audio-Transmitter-Receiver-CSR8675-Aptx-HD-Adapte...
https://www.aliexpress.com/item/CRDC-Bluetooth-5-0-Audio-Transmitter-Receiver-CSR8675-Aptx-HD-Adapte...