Can customization be added to dopus field type icons?

I added a search box to the toolbar, but the icon cannot be customized
图片

Its pixel size is the default 22px, while my toolbar button size is 16px
Pixel mismatch will increase the height of the entire toolbar
Is it possible to add customization to this icon of the search box?
This way I can use the 16px icon without raising the toolbar height
Or is there another way to solve this problem?
PS: I'm used to Windows default 16px icon