Mid Patch 6.9 Update - When is it?

So from my understanding, we received a mid-patch update a few days ago in the form of a hot fix, and from my experience a hot fix is a small mini-patch to address major issues before the games regular update schedule.

So my question is, when is it? We got the patch notes for the hot fix (let's call em 6.9.1), so theoretically it'd be live by now, but it isn't? I'm unsure if it's a bug with my client or the hot fix still hasn't rolled around yet and I'd really like some clarification (also cause I'd really like to have Cassiopeia use-able right now).

Thanks!