I would bet money that most of the "certification" process for technicians (aside from high voltage electrical safety, which is common to ALL EVs) is an NDA that grants access to unnecessarily proprietary diagnostic software. All this fancy talk about certification is just an excuse to charge consumers more for maintenance by adding an illusion of complexity.
This sort of crap is exactly why we need stronger Right to Repair protection. If a company [that sells consumer products] goes under, the specs, schematics, drawings, and source code, etc should go into the public domain. It can be the owners' job to parse through it all and figure out what to do about making/procuring replacement parts and finding mechanics to service the technology, but that data should at least be available.