Visual-Studio warning reportMissingImports, warning "Consider adding this directory to Path or..., paths mismatch due to lowercases

Question

window10, pip version 21.3.1

My paths of pip and module are not matching, which likely resulted in reportMissingImports warning in Visual Studio.

pip:

C:\Users\NG\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\site-packages\pip （python 3.9)

flask: I don't know why they are in lowercase, which likely caused the issue

c:\users\ng\appdata\local\packages\pythonsoftwarefoundation.python.3.9_qbz5n2kfra8p0\localcache\local-packages\python39\site-packages

I have referred to the answer PIP 10.0.1 - Warning "Consider adding this directory to PATH or..." and moved up paths in environment variables. Yet the paths still mismatch.

I would be grateful if someone could help me out. Thank you.