speculation time: Haley has said she was thinking about Tarantino/Bond when she wrote "Somewhere in Between" and has said she hoped it'd be in a movie some day.
Rodriguez is "Tarantino-adjacent", they've worked together on several projects, like "From Dusk til Dawn", there's a lot of similarities between their directing style, how they both like to do projects that are 'outside the box'....
For Haley's East Coast swing, I don't know about the other shows, but Haley performed "Somewhere in Between" at the Mercury Lounge, the show Rodriguez attended w/ his kids, at least one is a big fan. She didn't have that song on the set list on her earlier US LoFiSoulTour
Haley mentioned that Rodriguez' son is doing the music for We Can Be Heroes....
I think IF Haley has a song in this movie, I'm going to guess it'll be "Somewhere in Between"