On Fri, Jan 22, 2021 at 06:29 PM, Gene wrote:

I don't know how different browsers and screen-readers describe the structure that you need to close.

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Since this is an overlay screen, which essentially replaces and blocks the underlying screen, it's probably not described as a separate thing by most screen readers.

There is descriptive text followed by 3 buttons, the last of which, as you noted, is "Maybe Later," which closes that overlay screen.  These are essentially dialog boxes but with an appearance such that the underlying content is completely obscured, hence the term overlay.
 
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Brian - Windows 10 Pro, 64-Bit, Version 20H2, Build 19042  

The depths of denial one can be pushed to by outside forces of disapproval can make you not even recognize yourself to yourself.

       ~ Brian Vogel