Flutter Developer with iOS Expertise

I'm looking for a seasoned Flutter developer with advanced expertise in Flutter development specifically for both iOS and Android platforms.

Key requirements:
- Rich Notifications
- Silent Notifications
- Notifications with Image
- Notifications with Action buttons
- Agora Calling

These all features working in Android we are facing issues for iOS only.

We have some other tasks as well like :
In-App purchase for iOS
Invite feature for iOS

To get this project awarded freelancer have to fix first task of notification first then we will discuss for others.