Because of your accompanying screen issue, this post is of no value except as an insight into what an exciting life I lead
I had my 1 year old Nokia repaired under warranty (very efficiently) because of the fiddling to hold the cable at an exact position.
I had learned through Nokia forums it was a known issue with the charging port on mine and one or two other models where the port internally warped / expanded or loosened due to poor material etc.
As soon as I mentioned to Nokia Chat support it seemed a known issue there were no more questions and they were terrific.
This was also my first usb-c phone and I wasn't pleased, and never understood the need to replace the shape because some found putting the cable in one way was too much pfaff.
I saw 2 videos where both the port and a charging board were replaced, but I didn't need to resort to that.
It sounds like your port expanded or warped in some way.
When I was having the issue I could bring up the full screen battery icon in Settings - Battery and if it turned Blue and said Charging it was charging in that position. If the home screen showed it was charging but the battery icon was white on the battery screen it wasn't charging, so the home screen / notification bar was lying
I admire that you are young but want to keep using what you have.
It does sound like a motherboard problem as the previous posters said, but maybe something is still repairable or salvageable.