Originally I'm fan of Redux! So I could describe with long text containing trivial thing...
We call Redux in React world generally, that's combined 2 another library "React" "Redux" by "react-redux".

So, Redux(combined React) manage global value based on Flux essence. you know Dispatch Named Action with payload...

My React AppState has nothing to do with Redux.
Which constructed React build-in feature "state/context/hooks".

Thank you, this is great question I think.
I should start write more straight to understand post with sample code 👨‍💻

short answer is... React AppState designed set/get direct values 🌍

import { useAppState } from '@ryotamurakami/react-appstate'

const MyComponent = () => {
  const [appState, setAppState] = useAppState()

  function toggleDarkTheme() {
    setAppState({ isDarkTheme: !appState.isDarkTheme})
   }

   return (<button onClick={toggleDarkTheme}>{appState.isDarkTheme ? 'Disable DarkMode?' : 'Enable DarkMode!' }</button>)

}