Content on the Samsung website doesn't make sense. APTX is supported on the Qualcomm 675 and by Android 9. (Pie.)
So please just escalate this if you need to.
To the rest of the community, is there anyone which is using the A70 and APTX. If your using APTX, which version (Low Latency, HD, Adaptive, etc.)
The Samsung A70 page makes no reference to LDAC either so it is not to be trusted;
The APTX page is, as you acknowledge, way out of date;
The Community forum page you mention only confirms what I am saying: Why does the A70 not support APTX if it is using the Qualcomm 675 and Android 9?
This problem is also happening on the Note 9 which uses the Qualcomm 845 which supports APTX.
I want an answer. Why do both the A70 and Note 9 not support APTX when they should.
Just answer the simple question.