Hey, this is the worst answer but I changed in AkWwiseInitializationSettings.cs
[UnityEditor.MenuItem("Edit/Project Settings/Wwise Initialization Settings")]
[UnityEditor.MenuItem("Edit/Wwise Initialization Settings")]
The issue is that using MenuItem() to add stuff to "Project Settings" is now flagged as an error by Unity, they want people to use the new SettingsProvider() attribute.
I am not aware of a way to disable the warning so had to do it this way. It moves the menu item, but, it's still pretty easy to find. Just make sure your audio crew knows where to look if they need stuff there.