Have you tried installing the Pixel 5 version of Device Personalization Service?After updating to July, and re-rooting and re flashing both the add-on and system UI, when I turn on adaptive sound service, and go to settings, the option doesn't show up in the sound&vibration settings. Even went out of my way to reset the phone and re root and re flash again. I also did a search in settings for adaptive sound and nothing. Any idea whats going on?
Edit: it to be the system UI package that removes adaptive sound