Doesn't seem to be a word about it on the scanlator's site, maybe as I suspected before it's a short series, and all chapters are in the pipeline? Or less optimistically, maybe they lost interest and quit working on it.

Maybe because Manase is actually an effeminate boy, not a girl. Therefore no yuri.
SPOILER at least until the final chapter of the manga, that is.

The one thing that the final Extra Life chapter is missing is showing how Asahi and his mother are fairing with Shio's own twisted personality. Was he able to accept his own sister like he wanted and after the shock of her now being like Sato gradually went away, or does Shio have absolutely no ties to her brother and mother as of now?

It was mentioned by Asahi that his mom was arrested for his father's murder and the timeskip shows Shio living alone. So no, Asahi is doomed to be a vagrant forever.

The Extra Life does need to show how is poor Taiyou doing tho.

Man, poor Souma, in this universe he's a girl and still not a chance on Himeko's radar.
You had your chance in Cross Triangle, leave Chikane and Himeko be