Lubuntu 26.04 LTS is an official flavor of Ubuntu, thus the actual release is handled by the Ubuntu Release team; meaning you can look at the Ubuntu 26.04 LTS Release Schedule for dates.
If you want to view what we have; you can always explore a current daily ISO; ie.
- Lubuntu 26.04 LTS (Resolute Raccoon) Daily Build
- https://cdimage.ubuntu.com/lubuntu/daily-live/current/resolute-desktop-amd64.manifest
gives a pretty good clue; and being an ISO; you can download it, and give it a try too.
Given how close we are to beta, what we have no is probably a pretty good clue.
Our blog site does highlight a lack of resources the team has had recently; this was made clear (I felt) with the Lubuntu 25.10 Release Notes which can explain where we are.