What exactly is currently availble in terms of the CGs in the pervert menu, because I know I've seen more CG than is in there, and i was curious if it was due to a problem or if its just not in there normally. The ones I know I've seen more of are

Harpy: I only have normal but i know I've seen the blowjob one, and i think there was also an anal scene?

Goblin M/F: I have Anal and Normal but not the one where they are sitting on my face or the one where they ride me

Adventurer: Only Normal, I've had several scenes with CG show up with them in it but none of them are in there, is it because i wasnt involved in them directly?

Ogre: Its just normal, I was pretty sure i saw an anal scene

I feel like theres probably others but those are the ones that I'm almost certain Ive seen and dont have,  I only have the anal knot for wereslut, is that the only one? Im assuming brigand only has missionary and irrumatio?

You're not wrong. There's many scenes that are not in the Pervert menu that you can come across while in game. This is is a question for the devs to answer for sure. It'd also be nice if there were some hints to unlocking scenes like there are for "events" in the Progress menu. It's still a beta so we'll see what they do with it in the end. I ended up finding a Mega PDF to figure out how and where to unlock achievements for the bonus points in the following playthroughs.