Currently at a few percent EVs there is a pretty decent charging infrastructure around. There is no reason that would not be the case for combustion engine cars, especially since it has been built already.

However what we will see is refineries being shut down, as they have to run at at least 80% capacity for technical reasons. So above 20% EV sales starts causing trouble for them. Especially in markets like Europe, where car adoption is not going to go up a lot. Obviously exports are an option as well, but to a limited extend. There are also not that many refineries around. The EU has less then 100 for example.