If you are experiencing issues with the Media Creation Tool downloading Windows 11, version 24H2 instead of 25H2, it may be due to the phased rollout of the updates. The 25H2 version is being made available to eligible devices, and it is possible that your device has not yet been selected for the update. To check if the update is available for your device, you can go to Settings > Windows Update and select Check for updates. If the update is ready for your device, you should see the option to download and install Windows 11, version 25H2.
Additionally, ensure that you have enabled the setting to get the latest updates as soon as they are available. This setting can help in receiving the updates promptly when they are rolled out to your device.
References: