Newer versions of firmware will let you do clearing of load shed right from service mode, make sure you have both headlights plugged and try to update the firmware to latest available version.
If you have latest version which is: 2023.2.10
You can change the battery type from Toolbox, this will let you plug regular acid 12v battery instead of Li-Ion and work on fixing the car the switch back to original Li-Ion afterwards.
In anyway make sure you have powerful enough external support to the LV system, should be between 13V and 16V, with 20-30 Amps.
The VCFront has eFuse system that stays open in case there was an accident, you can either clear the state on the bench (not sure how they do that, but can be done)
Or you can update firmware of car and clear it your self from service mode.
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