Addressable RGBW strip: is it possible to separate White channel and RGB channel?

I’m using ESPHome to control SK6812 strips, but I’d like to control th RGB channel individually from the white one.
I can do it using the native HA light controls, but I wish to control the channels individually from within a Lovelace card, and I haven’t found one that let me do it. If only the native HA light controls could be used as a Lovelace card…

So I thought separating the channels in ESPhome would expose an entity for the RGB channel and another entity for the white channel, then that woul probably work.
Is it even possible?

What entities do you have them?