XCUITest can't "see" macOS Tooltips?

I have a macOS UI in which some UI Elements have tooltips.
When you hover over a UI Element, (that has a tooltip), with the mouse for a couple seconds, a "tooltip" is presented for about 10 seconds.

I would like to verify that the tooltip strings are correct.

In an attempt to see what the view hierarchy contains when a tooltip is being presented, I included the following code in a test:

Code Block
uiElement.hover()
sleep(5)
print(app.debugDescription)

When this code runs, I can see the mouse hover over the UI Element, and after a couple seconds, I see the tooltip presented, then the code prints the view hierarchy to the console.

...however, the tooltip string is nowhere to be found in the view hierarchy.

It appears that there is currently no way to validate the correctness of tooltips in XCUITest.

Am I wrong?