Microsoft has shifted away from providing traditional, monolithic ISO files for Visual Studio 2019, favoring a web installer that allows for a customized, modular installation.
Do you need help with the command-line arguments for a specific workload?
Legacy Projects: Some older C++ or .NET Framework projects have specific dependencies that behave best in the 2019 environment.
Since Microsoft does not provide a direct ISO, they offer a command-line tool within the installer to create a "local layout"—essentially a folder containing all the files you would find in an ISO.
Visual Studio Community 2019 (Free for individuals and students) Visual Studio Professional 2019 Visual Studio Enterprise 2019
Microsoft supports this scenario fully, and the documentation is available on their docs site.
Even if the ISO seems to work, you have no idea if a rootkit was installed during setup. Some malware activates days later.