One of the stories could be considered slightly dub-con, I guess?

Also contains some dubcon and noncon, but sex between the main couple is consensual (it's BDSM though)

Near the end. In one of the extras, Wei Wuxian attempts rape roleplay and fails miserably because he loves Lan Wangji too much.

There's not much sex, but it's all consensual.

As much as an android can consent anyway

(lol)

Contains a backstory featuring noncon (gang rape), but all sex that takes place in the present between the main couple is consensual.

(At least the first story, I can't remember the second)

Starts off kinda dubcon-y but it's only that for like two seconds. Does contain rape/sexual abuse but none of that's ever shown, all the sex between the main pairing is pretty much consensual.