Thanks! I'm curious if this will get backported to 3.9.x series on Windows (3.9.1?), or de-facto we're accepting that this function is actually not fully in the limited api until Python 3.10 (because users building from Windows can't link against this symbol right now on 3.9).

I've marked this for backporting to the 3.9 branch. There's obviously no putting the toothpaste back into the tube though, it'll never work on 3.9.0 for Windows :-(

@python/windows-team -- FYI, not merging until one of y'all looks :-)

I merged PR #23598 instead which adds more symbols. Thanks anyway for your PR!