You don't say which Axxera model, you have, but on the model AV6115B, I get a "Rear Camera" icon on every screen. Just touch the "screen button" to turn on the rear camera, touch the screen again to turn the camera off. Great for checking the toad, since I usually can't see it at all in side mirrors unless turning a corner.
Tom & Kathy & our Goldendoodle, Sandy
2017 Thor Citation Sprinter 24SS (Diesel)
2014 Honda CR-V FWD, Blue-Ox Baseplate, Roadmaster Falcon 2 tow bar