Android 15 dropped a few days ago. This reply in this thread states the intent for development to continue with Android 14 and 15:
Android 14 evidently seems possible with this release of LineageOS 21:
Personal opinion, don’t waste your time with 14. Releases have been a bit slow and there was a jump from 11 to 13 (skipping 12) after 13 was already surpassed by 14 (and a few months later, 15 as well). Just jump straight to 15 and maybe you can catch up with the Android releases instead of being roughly 2 versions behind.
The title is a reference to Monopoly for anyone here who is young enough to not recognize it.