Not really relevant.

Singapore itself has huge financial disincentives to car ownership to begin with, they actively discourage it with huge fines. That's for gas using cars, and has been the case since decades.

It's also not that they worried that the insignificant market share of Tesla globally would live them without international buyers for their oil (which is a mere 5% of their much diverse economy). Besides, the dispute with Musk was over domestic use.

They are truly against cars, and in favor of buses and subway (which are both excellent in Singapore, which is also quite bike friendly).

From the article: City-state is pushing people to choose trains, buses over cars

It might be a good idea to read the article before attempting to add background to it.