Sadly, they are. What you can purchase and what you can legally drive are governed by different rules. In the EU, a vehicle doesn't necessarily need to have EU type approval to be imported and registered.

That's why you can, find non-EU-spec vehicles on European roads. For example, red rear indicators, even though EU-approved vehicles generally require amber indicators.

The process is tedious, and there may be modifications involved, but nothing outright prevents you from getting a Cybertruck individually approved and driving it legally on EU roads. I know of 5 or so cases, where somebody jumped through those hoops.