Hi Alex,
You're actually lucky with regard to your charging port in that your phone is one of the very few that has the port itself alone on a flex cable, making it a very straight-forward replacement that won't affect anything else in the phone. Well, that assumes you take apart the phone and put it back together correctly and without damaging anything in the process.
As I mentioned, the port itself is on a long flex cable that runs under the battery to the motherboard. You can find replacement parts on all the big sites like Amazon, eBay and AliExpress, but here's an example that came up on my cursory search.
[link|https://www.cellspare.com/oneplus-nord-2-5g-charging-port-flex-cable|OnePlus Nord 2 5G Charging Port Replacement - Cellspare|new_window=true]
I didn't find any iFixit-style guides to doing that repair, but I ran across one for the Nord 2 non 5G model that's very similar and will give you the outlines of the procedure. It's in Spanish but the Google Chrome web browser's language translation makes it very usable.
[link|https://www.nadiemellamagallina.com/en/manuales/smartphones-1/oneplus-655/oneplus-nord-2-1383/flex-de-carga-12546|Manuals / OnePlus Nord 2 / Charging flex - Nobody Calls Me Chicken|new_window=true]
I'd suggest you start out by following the iFixit guide to replacing the battery, followed by the daughter board replacement guide; that should get you at least 90% of the way to being able to swap out the charging port flex cable assembly; using the first guide I mentioned as an example should get you the rest of the way.
[guide|156310|OnePlus Nord 2 5G Battery Replacement - iFixit Repair Guide|new_window=true]
[guide|156311|OnePlus Nord 2 5G Daughterboard Replacement - iFixit Repair Guide|new_window=true]
As you work, take lots of pictures then you can use those to create your own charging port replacement guide here on iFixit. It's easy, fun, and will earn you the gratitude of those who come after you with the same problem.
[link|https://www.ifixit.com/Guide/new|Create a new Guide - iFixit|new_window=true]
Good luck; let us know how it goes, and feel free to ask if you have any questions.