I understand, I saw you mentioned JoiPlay as an outlier for you in earlier posts. I will say though that I've been through the entire reborn game directory, save file location included, and cannot find any other file that mentions sharedpc or sharedbox besides the rb I placed in the mods folder. I'll try the discord but is there anything else you could recommend for troubleshooting if it isn't even making that folder as it should?
Thanks again
EDIT: I went and tried the Discord. Someone named enu in there tried to help me but believes that JoiPlay shouldn't be different than desktop in this regard, though they did mention that JoiPlay runs natively in portable mode. Does that make a difference for your mod?