If you are not able to connect to 2k servers 2k20, then it means you are making such kinds of mistakes. Lets see below.
Your PC is not connected to the internet.
Internet data limit exceeded.
I hope this information will help you. Also, one thing I want to add to this post is that the NBA2K20 game server has been discontinued after 31 Dec 2021. So if you are now trying to connect it, you will be not able to do.