Size of white balance eye dropper

[Egregius ([Greg] (Micro 4/3 + Win11))]

I think this feature request already exists:

Change to white balance eyedropper tool

Hello, I have noticed that the white balance eye dropper seems to sample a very very small area, which seems to cause issues on high ISO images. If you put the eye dropper over your grey card in the photo and click and hold and slowly move around the grey card (just a few pixels in any direction) you can see the white balance shifting slightly on low ISO images and shift more extreme on high ISO ones. I am currently unable to rely on the tool at about ISO 3200 and up. Would it be possible to …

What do you think?