It's possible that you accidentally caused a short while trying to do the repair, in which case it would be understandable that the lightning port would no longer function. The fix would require micro soldering unfortunately.
To rule it out you could purchase a new lightning connector on the off chance the connector itself is fried. One way to quickly rule this fix out is by process of elimination. If the battery, screen, etc. all function except for the charging port then I would give it a shot.