Our understanding is that there will be a stable release of Android 15 on October 15th. We fully ported all our changes to it by September 3rd after the early source code release in September. We'll aim to have a release out within 24h of the stable release being pushed to AOSP.
Today, they published the Android Security Bulletin for October with the security patch backports to the initial releases of Android 12, 12L, 13 and 14. There should be a monthly release based on Android 14 QPR3 today or tomorrow. If not, we'll do a release with the backports.