In other words, where are the "bounce" time signatures? Yes these are used in modern music, example: Wagon Wheel.
If you set the tempo in Session guitarist x2 and in your DAW you set the time signature to 6/8 it should work.
I wouldn’t have used Wagon Wheel as an example of “modern music” 😂😂😂
Maybe Bury a friend by Billy Eilish or Lost in Yesterday by Tame Impala (12/8) and Subterranean homesick alien by Radiohead or From the inside by Linkin Park (6/8) work better for describing “modern” 😉
Which Session Guitar library do you mean, there are quite a few now!