Ugh. Just as I said this, they refactored some stuff and some of the KCM (Kde Control Modules) haven't been ported over yet and so don't show up in system settings yet, and... well, it *was* easy to change to a dark mode, and it *will* be again soon, but right now... temporarily... not so much, at least in the dev builds. Non dev builds may still have the old setup. Thought I should mention this before anyone tried and went crazy looking!
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