Update: To Steam's credit, they approved my game on this same day, only a few hours after the intended release time, and it's now released! (original post below).
Unfortunately the release is currently delayed for an unknown amount of time, as Steam has not yet approved the build.
Build reviews for games using AI generation such as this one seem to be taking about a week per iteration, as opposed to the regular 2-3 days.
On the previous iteration, my build failed for 3 reasons, two of which I've already fixed and one of which is completely beyond my control: Steam themselves slapped a label "Requires 3rd-Party Account for AI Content Generation: OpenAI" which is completely wrong (according to what I read elsewhere, this seems like a widespread issue they accidentally did to every game declaring that it's *using* a cloud-based AI service). I'd already filed a support ticket for this issue weeks ago.
The build team said Steam's own label is blocking the release because there is actually NO required 3rd-party account to play this game.
It has been several days since my last resubmission, in which I fixed the two issues and asked them not to delay the game's release over Steam's own mistake. I hope they will approve it soon. Sorry about the delay and thanks for your patience!