Joomla doesn't offer the newest version
Click Check for updates in System → Update. If nothing shows, check the update channel in Options and that "Joomla! Core" is enabled in System → Update Sites.
Why it happens
Joomla checks for updates now and then and caches the result. It also only offers what your settings allow: the update channel, the minimum stability, and whether your server meets the next version's requirements.
Check these
- In System → Update → Joomla, click Check for Updates to refresh.
- Click Options: Update Channel set to Default offers updates within your major version; Joomla Next also offers the next major version. Minimum Stability should be Stable.
- Go to System → Update → Update Sites and make sure Joomla! Core is enabled.
- For a major upgrade, check the requirements in System → System Information: if PHP is too old, the option doesn't appear.
- Clear the cache (System → Clear Cache) and check again.
Good to know
- Your server must be able to reach update.joomla.org. If it can't, use upload and update with the package from downloads.joomla.org.
Sources
- Version Update – Joomla User Guide
- Joomla 5 to 6 Planning and Upgrade Step by Step – Joomla User Guide
