No. Oppo F9 is not a water-resistant mobile phone. Be careful !!
Yes, Oppo F9 does have the Corning Gorilla Glass protection.
No. Oppo F9 has MicroUSB port.
The most striking feature of the Oppo F9 is the big display with the waterdrop notch. It is well designed, delivers good battery life, and offers decent performance for the price.