@sengraham looks like your board is a 820-00850 board and the components are located by the left USB-C connector. It appears you lost two components from the bottom of your picture up, you got reference designator CC701 which is a 3.0pF +/- 0.1PF 25V capacitor in a 0201 package. Next component up, is L5100 which is a 1.2UH-20%-0.12A-1.17OHM inductor in a 0402 package. Those components should be readily available at places like Mouser.com or Digikey.com as well as many other places.
Now, as for the repair. You do know that you will need to go ahead and remove your board. MacBook Pro 13" Touch Bar 2018 Logic board Replacement then clean everything off with some isopropyl alcohol. Evaluate your board for any other damage.
To de-solder as well as re-solder the new components, you will need some decent tools. A good rework station is a must to solder on Apples logic boards. I would recommend that you start to practice on some old junk boards to get your technique down and that you know what heat etc. you will need. This is really not something that we can teach on here. Even a YouTube video can only give you ideas but it's not a substitute for practice.
Also, for now I do not see any reason to replace the connector since that is most likely not the reason since it does not look damaged at all. Of course, it could just be my old eyes and I may not see it. If you do, take another picture and post that as well.
Let us know once you have the board out etc. what your plans are and we can ty to guide you further.
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