Rodents chewing on wires?

90% chance they got into more wiring. They love to eat the soy based insulation GM uses.
DTC
C0126 = Brake Fluid Level Sensor Circuit - Might need to look at the level sensor wiring again if this returned after you patched the other wires.

U0422 = Invalid Data Received from Body Control Module - More than likely this is being set simply because of the ambient air temp or if they chewed on the AC wiring. This code is basically saying that the BCM and PCM are seeing different information based on a single system. So you turn on the AC and it doesn't actually work, you get this code because the ON trigger from the BCM is there but not the actual AC activation.

P0073 = Ambient Air Temperature Sensor Circuit High Voltage - Mousey might have chewed the wiring to it and now the AC doesn't see the ambient temperature and won't work because it doesn't know if it's warm or cold and the BCM refuses to activate the AC.

P1E00 = Hybrid/EV Powertrain Control Module 2 Requested MIL Illumination - Turned on the MIL because of the other codes, will go away once those are repaired as it is a constant monitor.

So for the C code, check that the level sensor has a good ground on the black wire and the Green w gray is good to the brake control module. A quick test for that would be to erase the codes and see if the C code returns, if it does there is still a problem.

For the ambient temperature sensor, it is up front behind the grill, there are two wires from it to the PCM 2 module, this is a simple thermistor circuit. The wires go through a few connectors and into the harness. I suspect they chewed on the harness itself and you will find that these are not the only wires that have a problem.