Your released app on iphone that doesn’t have usual notifications for review cards.
I’m using Anki on both iPad and iPhone. I have Reminders turned “on” in the Settings tab within the app, and I have all Notifications enabled for Anki Pro in the iOS Settings.
What this link says about AnkiApp applies to Anki Pro as well. Assuming you are using the “Anki Pro” in the screen shot. Every “Anki” in this image is fake. There used to be one fake Anki, now there are at least 4, so this page may need to be updated.
Assuming you’ve already tried disabling+enabling the settings in AnkiMobile, please go into the iOS settings app, find Anki down the bottom and tap on it, tap on Notifications, and then please attach a screenshot of what you see.