While AptX is standard on high-end phones, most manufacturers refuse to leverage Qualcomm's entire suite of codecs. Case in point is the OnePlus 13; it has AptX and AptX HD alongside LDAC and LHDC, but you miss out on AptX Adaptive and AptX Lossless. This isn't an issue most of the time, as an overwhelming majority of earbuds connect via standard AptX or LDAC anyway.
But if you bought earbuds or a headset that has AptX Lossless and want to get the best possible sound, you'll ideally want to buy a phone that integrates the codec. There's just one issue with that — not many phones have AptX Lossless, and outside of ASUS and select Xiaomi high-end devices, there aren't many choices.
