I am the author of this post, feel free to ask any questions and I'd be happy to answer.
Any names of known public manufacturers that sold rebranded Xiongmai devices? Any name/model of particular popular IoT devices that are affected?
In terms of well known brands, most brands hide using Xiongmai so there might be so well known consumer type brands but we have not discovered that yet. The typical Xiongmai brand sells to customers or SMBs at super low prices, where low cost is key.