ASUS TUF Gaming VG249Q1A has no PWM but it has FRC and backlight strobing

This monitor allegedly doesn't use PWM and is considered flicker-free according to TUV Rheinland, but it has FRC, which is a form of flickering. It also has "backlight strobing" (WTF?) according to this site: https://www.rtings.com/monitor/reviews/asus/tuf-gaming-vg249q1a

As for FRC, Asus describes it as: