We are using it in Unity (by calling TouchScreenKeyboard.Open) and it still works in 22.214.171.124.....
But there is something wrong with it. We just noticed problem which you described in the thread "Issues with the Keyboard overlay" that using bottom-right close keyboard key isn't handled by Unity. And if I click Oculus button twice when Keyboard is open then first click closes Keyboard and second click switches to Quest home screen - which is rather not expected behaviour. To back to the game I need to open apps list and click on the app icon.
Same issue (I think).
I can open and use the keyboard just fine (either by calling TouchScreenKeyboard.Open or through input fields), closing it is the issue.
If I close the keyboard by submiting the input, things work just fine.
Now if I close it by clicking outside the keyboard area or through Y button Unity does not trigger OnApplicationFocus(true) causing the same behaviour as jaceks described.
Having the same problem where clicking outside the keyboard does not return focus to our Unity app and
TouchscreenKeyboard.Status remains "Visible" forever when this happens.
Seems to be related bugs logged in the Unity Issue Tracker but they are marked "Fixed".
Was looking forward to the keyboard's dictation feature but this makes the keyboard completely unusable.