https://www.microsoft.com/en-us/software-download/windows10I...
Fine print: You need a non-windows user agent, otherwise you get redirected to a windows-specific page with no ISOs.
As an aside, you might want to install Ventoy to your flashdrive:
https://www.ventoy.net/en/index.html
That way you just need to copy the ISO to the flashdrive.