PySol III?
By happenstance, I recently discovered another fork of PySol called PySol III (http://pysoliii.freeshell.org/pysol/). It looks like it was forked sometime after PySolFC 2.0, and contains some additional games and enhancements, along with several additional types of cardsets.
The developer is listed as Patricia Kirk, possibly related to the T. Kirk who was previously active on FlowerSol/UltraSol, possibly even the same person. I would really like to get in contact with them - based on what I've seen, I think a lot of our goals align (the missing game documentation is one of the major issues described there, and adding the missing documentation was one of my first priorities when I joined PySolFC), but we went about them in different ways. Unfortunately, the last update was in 2020 and there does not appear to be any contact info.
A straight up merge of the code would be difficult due to the nature of the fork, but I'd like to see if there's another way we can integrate some of the features/concepts from there.
I'm relatively new to PySolFC and its community, but you could take a look at the in-game documentation of T. Kirk's games, like Imperial Trumps: There you will find an email address and could ask them about PySol III.
Noted. Though that documentation is rather old, and that email may no longer be valid.
Still, it's worth a try.