Broken Type-C Port

Okay, I couldn't find a good video for you to use nor a part supplier...

SO: Here's what you can do HERE is a video of a fellow doing a tear-down and reassembly of your keyboard, unfortunately he never gives us a look at the actual USB port inside, but that's Okay, you will see what you have when you get it open and the video DOES show you how to open it up and put it back together.

THEN, you have THIS video where a fellow shows how to replace the USB port on a gaming PC which, together, may allow you to do the job.

A side note, if you CAN'T get an appropriate USB port to replace the one you've got, you may be able to replace it by using a USB-C port on it's own PCB, use the wires coming from you board to the port if possible or soldering connections to the board itself to the port, gluing it in place of the old broken one (Half-arsed, yes, but possible if you can't find a better solution. That should let you do the job... maybe you can make a guide for the next guy who finds him/her self in the same boat.

Good Luck