Good Lock basically doesn't support M series phones running on One UI Core. One UI Core is the lighter version of One UI with only the essential features. But you can use SOME of the Good Lock modules (plug-in apps) on M series phones even though you can't use the main app. Use Fine Lock or Nice Lock. Both of these apps help you to "launch" Good Lock app modules. But remember for some modules to work, you will need to have Good Lock app installed, even though you can't use it (you can download Good Lock app via apkmirror.com).
