When you develop extensions or Debug in the SaaS environment. Generally, you should specified which sandbox is used in launch.json file. Today I found out that “sandboxName” in launch.json is obsoleted (Maybe I noticed it late).
“sandboxName”: Specifies which sandbox to use in cases where multiple sandboxes are owned by the same tenant.
This setting is obsoleted. Please use the ‘sandbox’ environmentType and the environmentName settings instead.
New environmentType and environmentName settings.
Microsoft has not updated DOCS yet.
Although you can set up to connect to the production environment now, you cannot publish and download symbol files so far.
Hope this will help.