Why isn't the Party Mix working on PS4?

Do you know why the party chat audio mix on the PS4 is so badly programmed? If I set the audio mix to audio that is not part of the party, the party doesn't get quieter, only the game gets louder… But what's the point if my ears ring because of the party?!

And for everyone who wants to know better again. I have an xbox one and the developers managed to make the AudioMix adaptable. You can make the party quieter on PS4, it doesn't work.

Does anyone know by chance whether this is different with the PS5?

Games on the PS5 and I can very well set whether I want the volume in the game or at the party to be louder or quieter. I don't know if this is also the case with the PlayStation 4.

No, unfortunately not, that's why the question was whether someone knows whether it is different with the ps5.