You may often come across "Preactivated" ISOs on third-party forums or torrent sites. While these seem convenient, here is the professional IT stance on using them:
Windows Server 2022 ISO Download and Bootable USB Install Guide windows server 2022 iso preactivated top
If you have purchased a license, you can enter the 25-character product key via the Settings > System > About menu or using the command line tool slmgr.vbs /ipk . You may often come across "Preactivated" ISOs on