Good luck doing diagnostics... There are several measures in place to protect the proprietary software and systems. I asked a technician pretty directly the odds of breaching the security to tinker with the source code.
Even if you did, there would still be the need to disclose how you diagnosed issues as you negotiate for parts to replace (if needed). Ukraine, with the war, has many import restrictions for electronics (another barrier).
Best advice would be to put the cars back together and try to sell the cars in a country where Lucid sells. Cars should be rolling out or soon to roll out as reviews pop up of the European Dream Edition.