Windows terminal has now a new feature called Fragment Extension. This can be used by third party applications to let Terminal know they exist. So, if the python team add a Fragment Extensions for python it allows python to appear directly as a profile in Windows terminal with the official icon and possibly other customization. More info here https://docs.microsoft.com/en-us/windows/terminal/json-fragment-extensions.
Currently if we want to add python to the list of profile, we need to do this manually but Python should be added to Windows terminal itself.
A good example is the new git-bash integration recently added to git for Windows https://github.com/git-for-windows/git/issues/3183