Best thing you can do for LED strips is to connect it to a flicker free dimmer control, such as this one made by waveform lighting. Requires a little DIY but it will mean 0 flicker.
To be pedantic, they advertise 0 flicker when capturing with a camera at up to 240 fps. It’s probably still using PWM with maybe a few kHz, so physically, it’s still flickering.
https://store.waveformlighting.com/products/filmgrade-flicke...