Tesla also supplied a drivetrain and battery pack for a B series car from Mercedes. At this point all of the big carmakers consider Tesla a competitor and EVs too important to outsource.
So they buy the big two components, motors and batteries, from other people rather than Tesla's (it would seem) superior ones.
There is so much EV plans of actions in companies seem to almost only be for mollifying activist investors livid that their particular company has been asleep at the wheel for 20 years of Tesla's rise.
Otherwise someone would be partnering. No one wants to admit they suck at engineering though.
