VS Code Python, entry in Run&Debug not present in launch.json

I just started using VS Code to develop in Python, I have the official Python extension installed, and I'm trying to configure the Run&Debug menu.

In one of my workspaces, I created the following launch.json file, with THREE configurations (test.py, preview.py and Project Tests):

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "test.py",
            "type": "python",
            "request": "launch",
            "program": "./test.py",
            "cwd": "${workspaceFolder}",
            "console": "integratedTerminal",
            "justMyCode": true,
            "variablePresentation": {
                "all": "inline",
                "class": "group",
                "function": "hide",
                "special": "hide"
            }
        },
        {
            "name": "preview.py",
            "type": "python",
            "request": "launch",
            "program": "./preview.py",
            "cwd": "${workspaceFolder}",
            "console": "integratedTerminal",
            "justMyCode": true,
            "variablePresentation": {
                "all": "inline",
                "class": "group",
                "function": "hide",
                "special": "hide"
            }
        },
        {
            "name": "Project Tests",
            "type": "python",
            "request": "launch",
            "program": "${file}",
            "cwd": "some_folder",
            "console": "integratedTerminal",
            "justMyCode": true,
            "variablePresentation": {
                "all": "inline",
                "class": "group",
                "function": "hide",
                "special": "hide"
            }
        }
    ]
}

However, in the Run&Debug menu I see FOUR entries..."test.py", "preview.py" and "Project Tests", the ones I configured in launch.json, and "Python: File", which is applied to the currently open file in the IDE.

I was assuming this "Python: File" might be some default option which is always present, but then I have another workspace where I created launch.json with only one entry (process.py):

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "process.py",
            "type": "python",
            "request": "launch",
            "program": "./process.py",
            "cwd": "${workspaceFolder}",
            "console": "integratedTerminal",
            "justMyCode": true,
            "variablePresentation": {
                "all": "inline",
                "class": "group",
                "function": "hide",
                "special": "hide"
            }
        },
        
    ]
}

and here I only have the corresponding entry in the menu as well:

I tried deleting and recreating the launch.json file in the first workspace, but the result is always the same.
How does this work precisely?

Simply copying your launch.json does not lead to the same problem.

So I don't think this is only a problem with the launch or debug itself. I have a speculation that you can try it out:

Click Python and choose Python File then click on the gear.

This will add Python: File related settings in launch.json for you, and then try to manually delete them after saving launch.json.