I have the MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports) and I've been having weird charging issues (I recently upgraded to macOS Big Sur if thats relevant). When I connect the charger it won't always charge, and when I press the battery symbol it only says "not charging". One of the ports never works, but the other works after its been plugged in for a little while.
The battery still drains when the charger is connected but not charging.
I've tried resetting SMC, troubleshooting/diagnostic scan shows nothing wrong, the ports and the charger looks undamaged…
The battery works completely fine as far as I know other than this, this is a recent issue.
Best Answer
Firstly, make sure that you are using the correct charger, and not a lower-rated charger from a different Mac, such as a MacBook Air. If you have another charger, or can borrow one from a friend, it's worth checking whether a different charger works correctly or not. (Or alternatively, see if the charger works ok on another Mac.)
As this is a recent purchase, you should take it to an Apple Store for investigation. I realise that may be difficult at the moment with Covid-19 restrictions. It's likely to be a hardware problem that can't easily be identified or fixed remotely. (I wait to be proved wrong!)