I asked the dev of said mob (asahibito) on his mod thread if these additional renders were done by him or came from the game dev, Kuvira. He replied he wasn't at liberty to say, which, if you read between the lines, answers everything. I'm assuming these renders were done by Kuvira, maybe shared on his private Discord on some hidden, high-tier Patreon channel, and that asahibito used them and crafted some quick script around them, with or without Kuvira's consent. Obviously Kuvira would never acknowledge the existence of this mod or these renders publicly, and the fact that this mod is an F95-exclusive, with mod files directly hosted on F95 so that download links can't be leaked elsewhere, also tells you how low-profile this thing is intended to be.
I love the game Lovephobia myself, but this mod feels weirdly out of place as the script around these additional renders doesn't integrate well with the game story, and once you're back into the actual game script these non-canon events and relationships are not acknowledged. So the mod feels more like a "might-have-been" than anything else, and got removed once experienced.