Do you mean explicitly on screen? If so then I agree* with an asterisk there.there's not much of it.
If you mean in general. I disagree.
You don't always see it. But the vast majority of characters lets it be known that they bang others constantly.
Looks like somebody disabled Takahrio content.How many ever even talk about their other sexual escapades, an entire race where sex is like having a sandwich?
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Aside from that? There's a metric ton of sex between NPCs. Some of it one off. Some of it explicitly shown or directly stated.
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Evergreen is one of the characters that's not included for the same reason that Zuzaan isn't included.Take Evergreen.
You can make the reasonable assumption with both of them. But it's not directly stated or explicitly shown the way it is for the vast majority of other characters.
I've probably missed a few.
You could combine every single mod of CoC1, the entirety of TiTS, Degrees of Lewidity, and (as of 4 years ago at any rate) Flexibile Survival and still not reach the amount of NPC x NPC that's in CoCII.
The only place (so far) where half of the characters aren't actively fucking each other or others is the Vulperine village. Give it time. I imagine that'll change too.