How does mode-watcher integrate with prefers-color-scheme? (Datawrapper question)

[eudemocracystiftung]

Hi,
I am using mode-watcher on a website, and now want to embed Datawrapper charts. These charts have a dark mode feature that is enabled by prefers-color-scheme (see https://www.datawrapper.de/academy/dark-mode-in-embedded-datawrapper-visualizations).
So far as I can see, mode-watcher has no impact on prefers-color-scheme. So what is the best/easiest way to switch the charts to dark mode upon toggling the mode-watched icon? If I could avoid needing an {if} condition on every chart, that would make my life easier.
Thanks!