Here is a wsy to test paid watch faces on your watch as there is no trial in the watch store in the Health app:
https://consumer.huawei.com/uk/comm...Test-Paid-Watch-Faces-for-FREE/topicId_38464/
https://consumer.huawei.com/uk/comm...Test-Paid-Watch-Faces-for-FREE/topicId_38464/