You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
Three months seems excessive. What do you see as the status when selecting setting (the car icon) and then the software tab? Maybe you’re on old enough firmware to not have the new software tab.
At 3 months, I’d probably open a support ticket using the phone app > schedule service > software update.
This all assumes you are on a strong wi-if signal when the car is parked either at home or work....