The latest release with TYPO3 v12 is currently being distributed to all easyWeb in tranches over several days.
The latest release 6.0.0 is currently taking place. For this release, the easyWeb instances will be updated in tranches, i.e. until the process is completed (probably on October 29), some instances will still be on version 5.3.0. Whether your own easyWeb instance has already been updated can be seen in the backend. The old version "11.5..." or the new version "12.4..." is displayed at the top left of the backend next to the TYPO3 logo.
The main change between release 5.3.0 and 6.0.0 is the upgrade from TYPO3 v11 to TYPO3 v12. If there are any problems with the TYPO3 v12 instances, please register this immediately with the Service Desk.