Hi @patelparth
Here is an image taken from the service manual for the phone, showing the charging troubleshooting flowchart and also some images showing the components mentioned in the flowchart giving their location (zoomed in and also of the board they're on) in the phone.
[image|3032622]
[image|3032624]
[image|3032623]
(click on images)
It may be as simple as a faulty USB-C connector if it fails the first test i.e. it says to replace the sub pba (charge port board.
There are videos online that show how to either replace the charge port port entirely or to remove the board so that the USB-C port can be replaced. You would need to have smd (surface mount device) soldering skills and tools to just replace the USB-C port, changing the whole charge port board may be easier.