You're missing the point, it's not about BDSM gear itself, it's about the idea and concept of exposure and power dynamic. All Xeno games have it one way or another, Bayonetta literally ties the character with the idea that freedom of the flesh means power as you fight lawful angels who should be on top of her.Wearing leather doesn't instantly mean BDSM. And if you wanna split hairsBayonetta isn't even wearing that.
And Kosmos is just a big tiddy robot with the soul of Maria, also not BDSM.
Spoilers kind of.
Bat is playing Cabela's 2011 as a reward for the last Neverending Challenge met goal
Beri is experiencing nu-retro with UFO 50