This is a Tuta list of alternatives to certain Google applications or related.
There are some good and not so good recommendations. An example of not so good recommendation is the adoption of Android OS that requires root access. This isn’t normally a good idea because compromise security in your device.
Nevertheless, in general the list seems to sustain the overall consensus around the privacy community.
GrapheneOS is one of the most well-known de-Googled operating systems, which is built primarily for Google Pixel devices. GrapheneOS does offer limited support for some other manufacturers, but there is no full degree of functionality on non-Pixel devices.
I actually suspect it was a translation error from German.
This article appears to just be an updated version of an old one and the GrapheneOS website does/did mention support for things like dev boards such as HiKey.