They ''could'' be an issue. That’s part of the power rails for the WiFi chip. Which is the big grey one that’s right there. But even if they’re oxidized on the surface of the soldered ends, they may still work perfectly fine.
If you have a multimeter you can check to see if they are short to ground. (You can use diode mode, or resistance mode for this).
I would actually be more concerned about this area.
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It’s possible it cleaned up totally okay. But the two Texas Instruments chips (CD3217…….) cause a lot of hassles with regards to power issues in MacBooks. They are the controllers for the USB C ports and are part of the process involved in negotiating charge voltage (USB C is capable of outputting in several voltages).
In most models, they are encased in an epoxy sort of resin (underfill), like the WiFi chip. You can tell it’s got a border of resin around it and over some of the surrounding components. But these don’t look like they are. Liquid damage under there could cause some weird issues depending on how far it made it under the chip. That area of the chip carries signals for a few power rails. And if there’s no underfill, there could still be corrosion under the chip that you can’t get with isopropyl alcohol and a brush.