I think no petrol/diesel car sales by 2035 is a dream, as we know that big countries are still investing in petrol and diesel mining so if there are no petrol/diesel cars then petrol or diesel sales will drop, especially since switching to electric cars also requires almost the same power or cost. Moreover, even now in developing countries there are still many homes that do not have electricity.
Such initiatives can be successful. If we consider a few things we can easily understand that there will be no more oil-powered car in the future. If an electric car can be operated for less than the cost of driving a combustion engine car, it will definitely be accepted by everyone. On the other hand, electric cars will not harm the environment, so a user can benefit from all sides. The EU aims to implement this by 2035. While it is easy to take such steps in developed countries, it will not be easy to implement it in underdeveloped countries. Because there are many countries where electricity supply is still not 100%. But with the change of times, as everything is changing, at some point Oil powered car will also change. It's just a matter of time. I hope that electric cars will be adopted in many countries by 2050.