not much, only some crypto exchange is good, like binance,
huobi, bittrex
In the free market economy, there is no interference or unwillingness.
The proliferation of exchanges is essential both for adaptation and for the expansion of cryptocurrencies. Because cryptocurrencies are not limited to a single country and are not limited to a single geography.
Each country must have at least 3-4 different exchanges for a competition to take place. Which of these you choose is still up to you.