Like most things, the government are best targeting the low population/difficult/expensive to reach areas first.
Private companies will be quite happy to install infrastructure on profitable, easy to reach areas. They certainly don't need an incentive to install EV chargers on the main trunk routes around the country.
Look at broadband, private telcos are happy to shove fibre into high density towns/cities without any incentives. The outlying villages between those towns, nah you can stick with some tin cans and strings, it works fine.