Unfortunately, the simple answer is no.
I believe however that it is possible if you swap out the controller and display, upgrade from the 500s to the 500c or 500c BLE (identical but with bluetooth).
I have already made an inquiry to our friends at iGO and although they initially told me via email customer service, the Core 3.0 cannot swap out controllers, a follow up reply soon confirmed that I could in fact swap it out but it would never be capable of iGO Connect BLE. I am assuming that the motors that use a BLE Display have different sensors in the motor that relay such capabilities.
To get to "Off Road Mode" is simply an option that puts your bike into, what Tesla would call, "Ludichrist" Mode.
I have many ebikes. I have a 48v500w rear hub fat with 48v battery. I currently have it set up to have ludichrist mode on demand - no app - no special iGO Connect sensors in a specific motor, and a completely different controller and display.
I personally love the iGO Con ect idea and the app that allows you easier access to be able to access fast mode, strike that, access "off road mode", but wouldn't want to use an app while out or before for that matter. I'd want rhat mode on demand all the time.
Just imo