I am thinking if I could add another white analog strip in combination with an addressable ws2812 strip on my esp32.
You can if you use different pins Multi-strip Support - WLED Project
Yes you can.
but how, I have seen that, but I didn’t get that may be you could guide me for that.
And Thank You again for that.
You just set up one, then add a pin and set the other.
Under Config->LED Preferences go to Hardware setup and click on the “+” after your current strip.
That will give you the option for a new strip where you can choose a different GPIO and protocol type.
You can use one of the analog types.