OK. This seems like a popular theme
Amazon has restrictions for what a name can be and it cannot be dynamic. Most skill names need to be at least two words too. I have created a fork of the existing skill and the new one will potentially be called "My Tesla". The skill is in certification process right now (which is very painful). Hopefully it gets approved this time.
If this does go through, the plan is that in the short term both "EV Car" and "My Tesla" will have identical functionality. Going forward, support for other connected cars could be added to "EV Car" while "My Tesla" could remain specific to Tesla vehicles.