Everything else was successful.
When trying to "add dev container configuation files", I was unable to modify existing, when trying to specify python version override. For python, it says "feature is included in base image and cannot be removed". There is no option to change the version. I am able to manually copy the feature snippets into the devcontainer.json. And version that python 3.10 is the version after rebuiling. HOWEVER. debugging fails because a library isn't found. I'm guessing that that "latest" universal container has recently been upgraded to a new linux build/version and some things have been updated that break the tutorial.