Hi! I understand you're having trouble finding the Rexton Assist icon in your Rexton App on your iPhone. Let's get this sorted out together.

To start, when you open the Rexton App, normally the "?" icon or the Rexton Assist icon should appear on the main screen or at the top. Since it's missing, let's try a couple of things in order:

1. Restart the iPhone - A simple restart can sometimes restore missing icons.
2. Make sure your hearing aids are connected via Bluetooth - The app may hide the Assist feature if it doesn't detect your devices. You can check Bluetooth settings on your iPhone and confirm your hearing aids are connected.
3. Check inside the app’s menu - Tap the three-line menu (top left) in the Rexton App, then navigate to Settings > App Settings or a similar section. Sometimes the Assist feature can be toggled on or accessed from there.
4. Update or reinstall the app - Ensure your Rexton App is up to date via the App Store. If it is, you might want to uninstall and reinstall it to refresh its features.

If these don't help, it may be related to an app glitch or an update that changed the interface. From what I found, rebooting the phone has helped some users regain the Assist function1. Also, the official user guide says that the Assist icon should be on the home page once your hearing aids are connected2.

Can you tell me if your hearing aids are currently connected to your iPhone via Bluetooth? Also, let me know if you've already tried restarting or reinstalling the app. That way, I can tailor the next steps better for you.