These declarations are available on macOS 13.3 / iOS 16.4 but are still TBA'd.
Pull request: https://github.com/WebKit/WebKit/pull/12621
Committed 262842@main (5638cd7601d8): <https://commits.webkit.org/262842@main> Reviewed commits have been landed. Closing PR #12621 and removing active labels.
<rdar://problem/107904978>