Reddit reviews Saturn's Children (A Freyaverse Novel)

Saturn's Children by Charles Stross might count. Humans are extinct and only our robots are left.

Then again, it might not be what you're looking for, since some of the characters resemble - and act - like humans anyway. The main character is a sexbot, so obviously she looks and behaves human (as is her function). However, her artificial nature is very much emphasized and there are several instances of very non-humanoid robots.

But, from what I recall, there truly are no humans around...there's no cop-out where it's like "oh but they were hiding" or "here's a human who's been in cryosleep this entire time!".

This WP has a ton of overlap with the book Saturn's Children. AI based society, with hard wired programming to be slaves to humans. Therefore they have special police that makes sure nobody ever tries to clone/create humans, because if they managed it, they would all become slaves again.

https://www.amazon.com/Saturns-Children-Charles-Stross/dp/0441017312

The author's control of the book cover art can be pretty minimal. Stuff like getting a main character's race wrong is pretty common.

Even when they get it right, the author can disagree - I remember Charles Stross specifically mentioning on his blog how he objected to the US cover of "Saturn's Children". There's nothing inaccurate about the cover - the book is about an android who was built to be a sexual companion for men - and the cover definitely looks true to form, but it gives the wrong impression for the book.