Can the USB port on flipper zero be repaired or replaced?

sounds like its got a disconnected solder pad or maybe a couple, it is repairable but it might need micro jumper wires if the solder pads are damaged

It sounds like your USB-C port might be damaged. I would look inside the USB-C to check for damage (Bent pins or burns). If you see any damage, I would attempt to contact Flipper's Official Support to see if they can repair your device if it is under warranty before attempting to replace the port itself. If the device isn't under warranty, try updating the device via Bluetooth before replacing the port.

Also, to answer the core of your question, it is possible, but you will need micro-soldering skills/equipment.