'merchant's context imply RGBW and 32 bits to send to make it right!'
Ahhhh @allObjects, I thought you were with us here. Please re-read #1, #18, and my #21
@AkosLukacs points out GRBW as does the output #1 shows this also. I agree with that and thus point out the advertiser WS2812B error as there isn't the white component in that device. 24 bit. So is a 32 bit SK6812 variant, not WS2812B
'I can try to desolder one'
No need, unlikely to result in part number.
@Robin, world has become fluid... over time... unfortunately... and specs are often not as concise as we like, nor do images always match text and vice-versa... and more so reality... (If I'd have ordered RGBW as catalog / image(s) show and receive RGB only or worse, it is return on cost of merchant. Ambiguous catalog entries w/o free return just do not turn into order entries). In @AkosLukacs ' referenced item though, description, image, and text in merchant's context imply RGBW and 32 bits to send to make it right!