I currently do not own a 3rd gen to test on.
From a high level overview:
You should always test apps before listing them on new Clover devices to ensure that they work as expected.
The Clover Mini 3rd Gen has an updated screen size and resolution, so your app's UI might need to be adjusted. Make sure your app supports new hardware features or APIs specific to the 3rd Gen. Make sure it handles changes in connectivity and peripheral integration. It's best to test on the actual device to make sure it works.
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