Use the --layout command. This downloads all packages for a base installation.
This guide will walk you through everything you need to know: What the offline installer is, how to download the official ISO from Microsoft, how to create your own custom offline layout, and how to deploy it silently across your organization. visual studio 2022 offline installer iso
The bootstrapper will only download new and changed files (delta updates). After updating, you must regenerate your ISO file. Use the --layout command