The second is to use the Windows 11 Media Creation Tool, which automates the process of creating a bootable USB install drive or downloading an install ISO file. One is to use the Installation Assistant app, which you install on your PC to trigger a normal upgrade install via Windows Update. Microsoft offers several ways to download Windows 11 manually. But if you aren't seeing it there, or if you have lots of computers to upgrade and only want to download the new OS once, there are other options.
The easiest way to get Windows 11 is by checking Windows Update on a supported, fully up-to-date Windows 10 PC.
Installing on a PC with Secure Boot and any kind of TPM.What does my PC need to be “supported”?.