I dont think WiringPI has support for PWM now, however there is a sunxi-pwm module that (if script.bin properly configured) will map Allwinner hardware PWM someware to sysfs (/sys/class/sunxi_pwm/)
I didn't test it, but maybe you can find this forum useful https://forum.armbian.com/index.php/topic/1324-opipc-pwm-on-gpio/
I want to enable GUI desktop on Waveshare 3.2 TFT LCD with orangepi zero using Lubuntu or debian desktop images available at the website.
How to configure the LCD for GUI view.