On virtually all t480's I've seen having a broken USB-C port it was only the left one (some people don't even realize there are two!) so you can charge using the second one and since it has thunderbolt you could connect a dock and both charge and have e.g. a monitor on one port(obviously?).

On my current t480 I also succeeded in slightly bending the port shell tighter and using a USB-C cable with tighter tolerances to get the port to be usable for charging again, but it's a not guaranteed trial and error solution.