The main reason Binance can't be accessed without a VPN in Indonesian jurisdiction is because Binance does not have a license from the Indonesian government to run a trading broker. Binance does not have an office in Indonesia and they are also not registered with the Commodity Futures Trading Agency (Bappepti) which is under the Auspice of the Minister of Finance Repulik Indonesia. Even though Binance already has regulation outside the jurisdiction of Indonesia, the government still requires them to have a business license from Bappepti. Without permission, the government would block domain Binance and other futures trading broker so Indonesian couldn't use them without the help of a VPN. But Indonesian trader and investor can still use the binance exchange application on the playstore and so far in my opinion it has not been blocked.
OP, although I haven't used the BSC at this time but this guide is necessary for all those who don't know how it works and I think there is no rating limit for it. Apart from that, Binance Academy has also made it easy for those who are still confused about how to use it properly.