Not even the settings, just by default the iPhone 16 Pro at lowest volume was way too loud, had to make a shortcut to set it at 3% to get it low enough. Now just by default without using any of those settings low volume is actually low.
I do notice however there is a bit of speaker crackle on the lower speaker on low settings when the phone is charging, I guess it is noise from the charging circuit creeping into the audio.