You can buy good LED drivers with up to around 20kHZ PWM, but even 800 hz is enough to not see the flicker anymore, though it will show up on a video camera as stripes. It's the cheap 250 hz drivers that are painful to the eyes.
I use TP-link Kasa color-changing bulbs (although I'd be happy with any that can change colour temperature between daylight and candlelight), and the flicker sometimes bothers me.