Is there a mod that affects the 18+ scenes? (like more positions) in Drive? I can't access Discord.
No, currently there is no such mod that can change or add any new sex positions; these can only be implemented officially through the developers, not mod developers.
There's currently only the Moan Mod that can do that.
And the other mod is something called a Lactation Mod created by the same mod developer, but it's not released for public yet; it's still developing.
And please keep in mind that these mods only work for PC Windows, they do not support Android, Mac, and Linux.