So the new version (0.3.0) is in the testing apt repo. Now Jazzy needs a sync for new packages/versions to go from the testing apt repo to the main apt repo. This is a manual step that happens from time to time.
Looks like the last Jazzy sync was in June, so we might be due for a new Jazzy sync, see Preparing for Jazzy sync and patch release 2026-06-08.
- ROS Index shows the release as 0.3.0 / RELEASED for Jazzy
( tecgihan_driver - ROS Package Overview )
ROS Index probably just uses the last released/bloomed version, and not necessarily the last version available from apt, because that would be platform-dependent (Ubuntu debs vs RHEL RPMs and so on).