Yeah, LED lighting in any mech keyboards is pretty much ****. I guarantee the PWM flicker is not addressed, so that means they look like they flicker in your periphery as you move your eyes.
If RGB is a "main" feature they are marketing then beware. Keycaps being PBT, like on Leopold's board, is a sign of quality. RGB lighting is lipstick on a pig more often than not.
Part of me wants to punch many Youtuber tech channel salespersons since they promote crap RGB components all the time, especially in keyboards where they mostly have no good taste, like Jayztwocents and Linus