VSCode doesn't highlight the linting problems.
Only highlights the "first letter".
There is no hovering option on the error also.
I tried to uninstall and install again python and/or vscode, with no success.
The problems of pylint appear in the problems section on vscode so it is indeed working, just not as intended.
This issue is caused by the VSCode, You can downgrade the VSCode to version 1.61.2 to avoid this problem.
issue page on github.