Looks like they're blocking the ISO now.
You can wait or do the Clean Install. I've never heard of it being blocked. It even allows unsupported hardware.
Did you Upgrade from WIndows 10 or buy a Windows 11 PC? How do you like Windows 11 compared to WIndows 10?
I purchased the computer with Windows 10 on it last October, but when I purchase a computer, I never use the OS installed. I always do a clean install with OEM software, so I installed Windows 11 then Many Windows 11 things I like, and a few I do not. I hate the taskbar as I like to place all important (to me) software shortcuts on it (usually about 40) and the Win 11 taskbar does not have room for them all. In previous Windows versions, you could always stack the taskbar into rows and there was always enough room. Interestingly enough, I'm writing this on a Windows Insider version of 11, Build 25206, and it has corrected my taskbar problem by adding a "taskbar overflow" with an icon of 3 horizontal dots which, if clicked, shows all the shortcuts that the taskbar does not have room for. I like that very much and I hope Microsoft adds it to the stable version soon. The newest stable Win 11, 22621... , does not have this feature though there is a Beta version 22622... which has the taskbar overflow. Another feature of Windows 11 I dislike is that I cannot get to Settings with one click. However, it can be placed as a shortcut on the taskbar. I also dislike two clicks to get to the Apps menu and a couple of clicks to get to important commands such as rename, open with, print, etc.
But 11 sure looks pretty!
Frankly, 10 was much easier to work with than 11, but since 11 is where Microsoft is going, I guess that is where I want to be if I wish to keep up. I do try to keep all my computers updated (I have 7 Windows machines right now), though I frequently have more. I rarely have less. I am a frequent user of Feedback and hope that many of my comments have helped Microsoft decide changes to make.