There are many circumstances where can’t have “fully automatic” freshness bumps due to abuse. Certain events related to discoverability for project pages may have the requirement that page has previously been reviewed by a human at some point. Your page previously wasn’t in any queue to be reviewed since it was marked by you as unavailable up until when you changed its status.
Generally speaking, I do not advise developers to depend on the “Most recent” page for discoverability, as there are many games coming through those pages daily. My recommendation is to publish your game and start promoting it to your own channels. Additionally, utilize things like devlogs & major updates to ensure that your page can receive any additional boosts by our system if your page ends up being eligible. All of these can help ensure that your page is prioritized for internal review if needed for the page.
Hope that helps explain a few things