Yes, the LCD on the MacBook is where I learned of pwm dimming to start with. It's a solved issue for most LCD manufacturers.
Most OLED panels in the consumer market pulse at 240Hz. I can't see the flicker, but text is wobbly on the screen for me and I get headaches after a bit. Turn the brightness to 100 ... no more wobble, no more headache, and no more pwm.