You're looking to download Windows Server 2022. Here's the official information:

The evaluation version of Windows Server 2022 is valid for 180 days. If you need to extend the evaluation period, you can do so by running the following command in PowerShell:

If your organisation has already purchased licenses, you can download the full "Retail" version here.

The downloaded version of Windows Server 2022 will have an evaluation period of 180 days. During this time, you can evaluate the features and functionality of the operating system. If you need to extend the evaluation period or purchase a license, you can do so through the Microsoft Volume Licensing Service Center.