

I would also have a look at the XDA forum. A very large percentage of devices that are not officially supported have unofficial ports (Lineage and others) that run 99% as well as the official ones.
e.g. my old Galaxy S8 was not official supported but one of the staff members of XDA made a port that runs like an absolute dream.
Not that unusual. e.g. TOR started as a governement project. it was invented in the U.S. Naval Research Lab.