I can't plug a charger in my Note 20+
cable from the Dollar store. I went that route with charging in the car and would get the same message with the cheap stuff. Spent a few more bucks for a better combo and WOW a big difference. Yea, learned not to be a cheapo too cause my phone could blow up and set my car on fire. LOL
Do you mean you have Note 20 Ultra??? or do you mean Note 10+ ? Please share your device's model number.
what region do you live in?
If you live in a humid environment, your phone just may have become a bit more sensitive or something... You could take the phone to UBreakIFix and ask them to check the charging port as the battery's status. If it's not a hardware issue, then try to charge it wirelessly (if you don't have one, ask the repair techs if the phone is dead) and submit an error report to Samsung Members app after attempting to charge again.