Every single button on a stock controller is represented by a 3.5 mm port on the back of the unit. (ticgn.com)
The phone features USB Type - C connectivity, although, it still includes a 3.5 mm port for native compatibility with older headphones and audio systems. (androidheadlines.com)
It still has a 3.5 mm port if you dig cables and wires. (slashgear.com)