"Deprecates" means "signal that this will be removed in the future".
It's not clear to me if the article is saying that 12.2 deprecates it and 12.3 will remove it, or (what the article seems to suggest) if 12.3 will deprecate it and 12.x or 13.x will remove it.
(edit)
The answer is
apparently neither. Instead, it's been deprecated for a while, but Apple has granted an exemption via temporary entitlement, and is no longer willing to grant it in the future. So there's no technical change, but a procedural one.