Why does Quicktheme work for some live wallpapers but not others?
The short answer is Android doesn’t provide a reliable way for apps
to gain access to the image data of live wallpapers (including the Google Wallpaper app’s dynamic wallpapers). Muzei provides an API to fetch the current wallpaper, which Action Launcher supports.
Action Launcher has an fully open source API available for wallpaper developers to integrate into their apps. If you’re using a live wallpaper app that doesn’t yet support Action Launcher’s API, we encourage you to reach out to the app’s developer and request them to integrate Action Launcher’s API (it’s dead simple to do so!)
Workaround to this problem will be investigated going forward, but given this is a limitation of Android itself, there can be no guarantees as to their success. Thanks for your understanding!