I feel like I will create a duplicate but I know than @mjbvz will be able to point me to it so I can find the answer to my question unless I go on youtube and look at Matt videos... I mention that because I know indeed a video that would answer to my question but I would like to have the authoritative source...

How can I find the list of the vscode default behaviour for "editor.codeActionsOnSave": [/* ... */],
and is it possible to have an autocompletion in the near future?

I fell like a little more documentation should be available and I am not sure how to ask you that I know you are working hard to make it perfect and that maybe I should have searched more ...