What I understand is that the developer (a community member) is working together with Athom to expand the number of supported devices of this app and plans to release a new live version ‘soon’, which would become an official app then.
I know that the developer has added hundreds of new devices, in his free time, in the last half year in an effort to enhance the app. Including support for the 4-button scene device and issues with the 1, 2, 3 and 4 button version of these devices. There is quite a backlog of new device requests and bug fixes. So he is trying to catch up 
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Let’s hope the new live version is released soon. In the mean time you can use the test version (which does gets updated). Also check out the dedicated topic for this app: [APP][Pro] Tuya Zigbee App.
