You can directly download and compile ISOs with UUPMediaCreator. After you downloaded the script and stuff extract everything in a folder under C:\temp. Your desktop is not a good place because scripts typically have some limits.
UUPMediaCreator basically downloads the ISOs from official and legit sources, aka Microsoft servers, and then you can compile it into ISO medias.
Example usage to download the Windows Professional ISO (replace the build string with the version you want, it also works with dev insider versions):
uupdownload -s Professional -v 10.0.22000.194 -r External -c co_release -t amd64 -l en-US -o dlfolderDev
Example usage to download/compile Professional ISO for DEV Insider Build:
Dev (Desktop) -s Professional -v 10.0.22000.1 -r External -b Dev -c vb_release -t [your architecture]
This will download the ISO, now we want to compile it:
for /f %f in ('dir /b .\dlfolder\') do uupmediaconvertercli %CD%\dlfolder\%f Windows_11_Pro_amd64_English.iso en-US
Other methods and websites
If you cannot work with simple cmdline you better use UUPdump.