If you still want to get an ISO file, you can try creating one from the bootable installer. You'll need to use a third-party tool like hdiutil or TransMac to convert the installer to an ISO file.
Unfortunately, Apple doesn't provide a direct download link for macOS Catalina ISO files. However, you can use the following method to create a bootable installer: descargar macos catalina iso espa%C3%B1ol apple
Replace /Volumes/Untitled with the name of your USB drive. If you still want to get an ISO
Keep in mind that creating an ISO file might not be the recommended approach, as it may not be compatible with all systems or bootable. descargar macos catalina iso espa%C3%B1ol apple