Don't understand why they put background sounds in Accessibility. You don't need to have additional needs in order to benefit from some choice of background noise, they should have put into Control Centre (unless it's been overlooked).
Accessibility settings in MacOS, iOS and iPadOS have become a dumping ground for settings that have nothing to do with physical accessibility. Clearly, Apple is trying to score political points by moving settings from application/hardware preferences and burying them in Accessibility, in order to inflate the number of available settings. Apple wants to say "Look at us, we have this Accessibility thing with all these settings" when many of those settings should be located in more appropriate places.
MacOS
On a Mac laptop, trackpad scrolling speed is not located in trackpad preferences, but is buried in Accessibility (even though mouse scrolling speed is located in mouse preferences).
Mouse pointer size is not located in mouse preferences, but is buried in Accessibility.
To turn off spring loaded folders in the Finder, you don't go to Finder Preferences. Instead, that setting is buried in Accessibility.
iPhone/iPad
On iPhone and iPad if you go to Settings >Display & Brightness, there is no setting to control auto brightness. Instead, you have to go to Accessibility.
On iPads that have Touch ID, the setting to unlock by pressing the home button once and leaving your finger on the button is not located in Touch ID settings, but is buried in Accessibility.
Dynamic head tracking for Spatial Audio is not located in the Spatial Audio setting, but is buried in Accessibility.
Moving settings from the application/hardware preferences and burying them in Accessibility is not helpful at all. It just causes more irritation because people now have to look in two places to find things: the application/hardware preferences and Accessibility. Accessibility has become as convoluted as iTunes and this helps no one.