Desktop Settings doesn't change Download pop-up's theme

Hi everyone. I’ve faced a problem that it didn’t change the whole widget such as root launched folder or download pop-up in browser. Here is the cap picture. Could you guys help me or any guide is appreciate. thanks in advance.

Depends on the theme.

I wouldn’t expect root launched apps to use the user theme since it is using the root user theme settings. Dunno if you can change that.

For the browser, depends on the theme you are using if it supports popups.