Translation for Yuuki Yuuna wa Yuusha de Aru S was done, if anyone is interested.

Where is it?

on the internet

on the internet

Smartass.

A cursory search on vndb got me this page:

https://vndb.org/v16682

There's the link over there for the english version.

So no outright yuri - is there much / any yuri subtext, flirting etc?

Wouldn't surprise me if Tougo didn't show her hots for Yuuna or Karin crushing hard for her.

Note that this is the second one of these VNs. There's another one: https://vndb.org/v16448

I doubt there'd be much content here considering that it's just bonus material released alongside the DVDs and blu-ray. In other words, it's not a standalone visual novel that you can buy. Both are kinetic and contain 10 short scenarios.

Considering the characters are super likeable I will take any side content that will ease the pain until October :D