https://stackoverflow.com/questions/66387881/import-cv2-could-not-be-resolved/70645499#70645499
이 분 답으로 해결하였다. 감사한 분. 사랑합니다.
I am on a mac and struggle with this and this is the best way to do it, when ur in your .py file, on the lower left part of your vscode windown u will see the version of python you are using, click that and try different versions until your open cv command works, in my case, 3.8.8 worked for me.